diff --git a/README.md b/README.md
index c5e92a983..efce1d86d 100644
--- a/README.md
+++ b/README.md
@@ -62,6 +62,11 @@ The following is a list of all third-party dependencies included as part of the
     - Purpose: Supplementary Android Compose features.
     - License: Apache 2.0
 
+- **Appcompat**
+    - https://developer.android.com/jetpack/androidx/releases/appcompat
+    - Purpose: Allows access to new APIs on older API versions.
+    - License: Apache 2.0
+
 - **AndroidX Browser**
     - https://developer.android.com/jetpack/androidx/releases/browser
     - Purpose: Displays webpages with the user's default browser.
diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index 436ecc460..becd19745 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -29,6 +29,52 @@ android {
         versionCode = 1
         versionName = "1.0.0"
 
+        // This is so the build system only includes language resources in the APK for these
+        // languages, preventing translated strings from being included from other libraries that
+        // might support languages this app does not.
+        resourceConfigurations += arrayOf(
+            "af",
+            "be",
+            "bg",
+            "ca",
+            "cs",
+            "da",
+            "de",
+            "el",
+            "en",
+            "en-rGB",
+            "es",
+            "et",
+            "fa",
+            "fi",
+            "fr",
+            "hi",
+            "hr",
+            "hu",
+            "in",
+            "it",
+            "iw",
+            "ja",
+            "ko",
+            "lv",
+            "ml",
+            "nb",
+            "nl",
+            "pl",
+            "pt-rBR",
+            "pt-rPT",
+            "ro",
+            "ru",
+            "sk",
+            "sv",
+            "th",
+            "tr",
+            "uk",
+            "vi",
+            "zh-rCN",
+            "zh-rTW"
+        )
+
         testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
     }
 
@@ -102,6 +148,7 @@ dependencies {
     }
 
     implementation(libs.androidx.activity.compose)
+    implementation(libs.androidx.appcompat)
     implementation(libs.androidx.browser)
     implementation(libs.androidx.camera.camera2)
     implementation(libs.androidx.camera.lifecycle)
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 183fe41f7..5ec4014e5 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -16,10 +16,11 @@
         android:fullBackupContent="@xml/backup_rules"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:localeConfig="@xml/locales_config"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
         android:theme="@style/LaunchTheme"
-        tools:targetApi="31">
+        tools:targetApi="33">
         <activity
             android:name=".MainActivity"
             android:exported="true"
@@ -52,6 +53,15 @@
                 <action android:name="android.service.autofill.AutofillService" />
             </intent-filter>
         </service>
+
+        <service
+            android:name="androidx.appcompat.app.AppLocalesMetadataHolderService"
+            android:enabled="false"
+            android:exported="false">
+            <meta-data
+                android:name="autoStoreLocales"
+                android:value="true" />
+        </service>
     </application>
 
 </manifest>
diff --git a/app/src/main/java/com/x8bit/bitwarden/MainActivity.kt b/app/src/main/java/com/x8bit/bitwarden/MainActivity.kt
index 4882fa9fd..2989b5370 100644
--- a/app/src/main/java/com/x8bit/bitwarden/MainActivity.kt
+++ b/app/src/main/java/com/x8bit/bitwarden/MainActivity.kt
@@ -2,26 +2,40 @@ package com.x8bit.bitwarden
 
 import android.content.Intent
 import android.os.Bundle
-import androidx.activity.ComponentActivity
 import androidx.activity.compose.setContent
 import androidx.activity.viewModels
+import androidx.appcompat.app.AppCompatActivity
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.os.LocaleListCompat
 import androidx.core.splashscreen.SplashScreen.Companion.installSplashScreen
+import com.x8bit.bitwarden.data.platform.repository.SettingsRepository
 import com.x8bit.bitwarden.ui.platform.feature.rootnav.RootNavScreen
 import com.x8bit.bitwarden.ui.platform.theme.BitwardenTheme
 import dagger.hilt.android.AndroidEntryPoint
+import javax.inject.Inject
 
 /**
  * Primary entry point for the application.
  */
 @AndroidEntryPoint
-class MainActivity : ComponentActivity() {
+class MainActivity : AppCompatActivity() {
 
     private val mainViewModel: MainViewModel by viewModels()
 
+    @Inject
+    lateinit var settingsRepository: SettingsRepository
+
     override fun onCreate(savedInstanceState: Bundle?) {
         var shouldShowSplashScreen = true
         installSplashScreen().setKeepOnScreenCondition { shouldShowSplashScreen }
         super.onCreate(savedInstanceState)
+        // Within the app the language will change dynamically and will be managed
+        // by the OS, but we need to ensure we properly set the language when
+        // upgrading from older versions that handle this differently.
+        settingsRepository.appLanguage.localeName?.let { localeName ->
+            val localeList = LocaleListCompat.forLanguageTags(localeName)
+            AppCompatDelegate.setApplicationLocales(localeList)
+        }
         setContent {
             BitwardenTheme {
                 RootNavScreen(
diff --git a/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSource.kt b/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSource.kt
index 928de1ec5..2341f2693 100644
--- a/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSource.kt
+++ b/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSource.kt
@@ -1,12 +1,18 @@
 package com.x8bit.bitwarden.data.platform.datasource.disk
 
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeoutAction
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import kotlinx.coroutines.flow.Flow
 
 /**
  * Primary access point for general settings-related disk information.
  */
 interface SettingsDiskSource {
+    /**
+     * The currently persisted app language (or `null` if not set).
+     */
+    var appLanguage: AppLanguage?
+
     /**
      * Gets the current vault timeout (in minutes) for the given [userId] (or `null` if the vault
      * should never time out).
diff --git a/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceImpl.kt b/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceImpl.kt
index c2e02e3ed..715b38cfb 100644
--- a/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceImpl.kt
+++ b/app/src/main/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceImpl.kt
@@ -4,16 +4,19 @@ import android.content.SharedPreferences
 import com.x8bit.bitwarden.data.platform.datasource.disk.BaseDiskSource.Companion.BASE_KEY
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeoutAction
 import com.x8bit.bitwarden.data.platform.repository.util.bufferedMutableSharedFlow
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.onSubscription
 
+private const val APP_LANGUAGE_KEY = "$BASE_KEY:appLocale"
 private const val VAULT_TIMEOUT_ACTION_KEY = "$BASE_KEY:vaultTimeoutAction"
 private const val VAULT_TIME_IN_MINUTES_KEY = "$BASE_KEY:vaultTimeout"
 
 /**
  * Primary implementation of [SettingsDiskSource].
  */
+@Suppress("TooManyFunctions")
 class SettingsDiskSourceImpl(
     val sharedPreferences: SharedPreferences,
 ) : BaseDiskSource(sharedPreferences = sharedPreferences),
@@ -24,6 +27,18 @@ class SettingsDiskSourceImpl(
     private val mutableVaultTimeoutInMinutesFlowMap =
         mutableMapOf<String, MutableSharedFlow<Int?>>()
 
+    override var appLanguage: AppLanguage?
+        get() = getString(key = APP_LANGUAGE_KEY)
+            ?.let { storedValue ->
+                AppLanguage.entries.firstOrNull { storedValue == it.localeName }
+            }
+        set(value) {
+            putString(
+                key = APP_LANGUAGE_KEY,
+                value = value?.localeName,
+            )
+        }
+
     override fun getVaultTimeoutInMinutes(userId: String): Int? =
         getInt(key = "${VAULT_TIME_IN_MINUTES_KEY}_$userId")
 
diff --git a/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepository.kt b/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepository.kt
index 7e878c19d..dd45c81bc 100644
--- a/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepository.kt
+++ b/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepository.kt
@@ -2,12 +2,18 @@ package com.x8bit.bitwarden.data.platform.repository
 
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeout
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeoutAction
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import kotlinx.coroutines.flow.StateFlow
 
 /**
  * Provides an API for observing and modifying settings state.
  */
 interface SettingsRepository {
+    /**
+     * The [AppLanguage] for the current user.
+     */
+    var appLanguage: AppLanguage
+
     /**
      * The [VaultTimeout] for the current user.
      */
diff --git a/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryImpl.kt b/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryImpl.kt
index 59dcbdb59..b7d0f990c 100644
--- a/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryImpl.kt
+++ b/app/src/main/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryImpl.kt
@@ -5,6 +5,7 @@ import com.x8bit.bitwarden.data.platform.datasource.disk.SettingsDiskSource
 import com.x8bit.bitwarden.data.platform.manager.dispatcher.DispatcherManager
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeout
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeoutAction
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.SharingStarted
 import kotlinx.coroutines.flow.StateFlow
@@ -23,6 +24,12 @@ class SettingsRepositoryImpl(
 
     private val unconfinedScope = CoroutineScope(dispatcherManager.unconfined)
 
+    override var appLanguage: AppLanguage
+        get() = settingsDiskSource.appLanguage ?: AppLanguage.DEFAULT
+        set(value) {
+            settingsDiskSource.appLanguage = value
+        }
+
     override var vaultTimeout: VaultTimeout
         get() = activeUserId
             ?.let {
diff --git a/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreen.kt b/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreen.kt
index e32646206..5e6b0ef89 100644
--- a/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreen.kt
+++ b/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreen.kt
@@ -15,6 +15,7 @@ import androidx.compose.runtime.Composable
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
 import androidx.compose.runtime.remember
+import androidx.compose.runtime.saveable.rememberSaveable
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.input.nestedscroll.nestedScroll
@@ -25,12 +26,16 @@ import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.lifecycle.compose.collectAsStateWithLifecycle
 import com.x8bit.bitwarden.R
 import com.x8bit.bitwarden.ui.platform.base.util.EventsEffect
+import com.x8bit.bitwarden.ui.platform.base.util.asText
+import com.x8bit.bitwarden.ui.platform.components.BasicDialogState
+import com.x8bit.bitwarden.ui.platform.components.BitwardenBasicDialog
 import com.x8bit.bitwarden.ui.platform.components.BitwardenScaffold
 import com.x8bit.bitwarden.ui.platform.components.BitwardenSelectionDialog
 import com.x8bit.bitwarden.ui.platform.components.BitwardenSelectionRow
 import com.x8bit.bitwarden.ui.platform.components.BitwardenTextRow
 import com.x8bit.bitwarden.ui.platform.components.BitwardenTopAppBar
 import com.x8bit.bitwarden.ui.platform.components.BitwardenWideSwitch
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 
 /**
  * Displays the appearance screen.
@@ -74,7 +79,7 @@ fun AppearanceScreen(
         ) {
             LanguageSelectionRow(
                 currentSelection = state.language,
-                onThemeSelection = remember(viewModel) {
+                onLanguageSelection = remember(viewModel) {
                     { viewModel.trySendAction(AppearanceAction.LanguageChange(it)) }
                 },
                 modifier = Modifier.fillMaxWidth(),
@@ -105,15 +110,22 @@ fun AppearanceScreen(
 
 @Composable
 private fun LanguageSelectionRow(
-    currentSelection: AppearanceState.Language,
-    onThemeSelection: (AppearanceState.Language) -> Unit,
+    currentSelection: AppLanguage,
+    onLanguageSelection: (AppLanguage) -> Unit,
     modifier: Modifier = Modifier,
 ) {
-    var shouldShowLanguageSelectionDialog by remember { mutableStateOf(false) }
+    var languageChangedDialogState: BasicDialogState by rememberSaveable {
+        mutableStateOf(BasicDialogState.Hidden)
+    }
+    var shouldShowLanguageSelectionDialog by rememberSaveable { mutableStateOf(false) }
+
+    BitwardenBasicDialog(
+        visibilityState = languageChangedDialogState,
+        onDismissRequest = { languageChangedDialogState = BasicDialogState.Hidden },
+    )
 
     BitwardenTextRow(
         text = stringResource(id = R.string.language),
-        description = stringResource(id = R.string.language_change_requires_app_restart),
         onClick = { shouldShowLanguageSelectionDialog = true },
         modifier = modifier,
     ) {
@@ -129,14 +141,16 @@ private fun LanguageSelectionRow(
             title = stringResource(id = R.string.language),
             onDismissRequest = { shouldShowLanguageSelectionDialog = false },
         ) {
-            AppearanceState.Language.entries.forEach { option ->
+            AppLanguage.entries.forEach { option ->
                 BitwardenSelectionRow(
                     text = option.text,
                     isSelected = option == currentSelection,
                     onClick = {
                         shouldShowLanguageSelectionDialog = false
-                        onThemeSelection(
-                            AppearanceState.Language.entries.first { it == option },
+                        onLanguageSelection(option)
+                        languageChangedDialogState = BasicDialogState.Shown(
+                            title = R.string.language.asText(),
+                            message = R.string.language_change_x_description.asText(option.text),
                         )
                     },
                 )
diff --git a/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModel.kt b/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModel.kt
index 500863242..9480cc7c6 100644
--- a/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModel.kt
+++ b/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModel.kt
@@ -1,11 +1,15 @@
 package com.x8bit.bitwarden.ui.platform.feature.settings.appearance
 
 import android.os.Parcelable
+import androidx.appcompat.app.AppCompatDelegate
+import androidx.core.os.LocaleListCompat
 import androidx.lifecycle.SavedStateHandle
 import com.x8bit.bitwarden.R
+import com.x8bit.bitwarden.data.platform.repository.SettingsRepository
 import com.x8bit.bitwarden.ui.platform.base.BaseViewModel
 import com.x8bit.bitwarden.ui.platform.base.util.Text
 import com.x8bit.bitwarden.ui.platform.base.util.asText
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.flow.update
 import kotlinx.parcelize.Parcelize
@@ -18,11 +22,12 @@ private const val KEY_STATE = "state"
  */
 @HiltViewModel
 class AppearanceViewModel @Inject constructor(
+    private val settingsRepository: SettingsRepository,
     savedStateHandle: SavedStateHandle,
 ) : BaseViewModel<AppearanceState, AppearanceEvent, AppearanceAction>(
     initialState = savedStateHandle[KEY_STATE]
         ?: AppearanceState(
-            language = AppearanceState.Language.DEFAULT,
+            language = settingsRepository.appLanguage,
             showWebsiteIcons = false,
             theme = AppearanceState.Theme.DEFAULT,
         ),
@@ -39,8 +44,13 @@ class AppearanceViewModel @Inject constructor(
     }
 
     private fun handleLanguageChanged(action: AppearanceAction.LanguageChange) {
-        // TODO: BIT-1328 implement language selection support
         mutableStateFlow.update { it.copy(language = action.language) }
+        settingsRepository.appLanguage = action.language
+
+        val appLocale: LocaleListCompat = LocaleListCompat.forLanguageTags(
+            action.language.localeName,
+        )
+        AppCompatDelegate.setApplicationLocales(appLocale)
     }
 
     private fun handleShowWebsiteIconsToggled(action: AppearanceAction.ShowWebsiteIconsToggle) {
@@ -59,20 +69,10 @@ class AppearanceViewModel @Inject constructor(
  */
 @Parcelize
 data class AppearanceState(
-    val language: Language,
+    val language: AppLanguage,
     val showWebsiteIcons: Boolean,
     val theme: Theme,
 ) : Parcelable {
-    /**
-     * Represents the languages supported by the app.
-     *
-     * TODO BIT-1328 populate values
-     */
-    enum class Language(val text: Text) {
-        DEFAULT(text = R.string.default_system.asText()),
-        ENGLISH(text = "English".asText()),
-    }
-
     /**
      * Represents the theme options the user can set.
      */
@@ -106,7 +106,7 @@ sealed class AppearanceAction {
      * Indicates that the user changed the Language.
      */
     data class LanguageChange(
-        val language: AppearanceState.Language,
+        val language: AppLanguage,
     ) : AppearanceAction()
 
     /**
diff --git a/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/model/AppLanguage.kt b/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/model/AppLanguage.kt
new file mode 100644
index 000000000..70f1d7431
--- /dev/null
+++ b/app/src/main/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/model/AppLanguage.kt
@@ -0,0 +1,178 @@
+package com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model
+
+import com.x8bit.bitwarden.R
+import com.x8bit.bitwarden.ui.platform.base.util.Text
+import com.x8bit.bitwarden.ui.platform.base.util.asText
+
+/**
+ * Represents the languages supported by the app.
+ */
+enum class AppLanguage(
+    val localeName: String?,
+    val text: Text,
+) {
+    DEFAULT(
+        localeName = null,
+        text = R.string.default_system.asText(),
+    ),
+    AFRIKAANS(
+        localeName = "af",
+        text = "Afrikaans".asText(),
+    ),
+    BELARUSIAN(
+        localeName = "be",
+        text = "Беларуская".asText(),
+    ),
+    BULGARIAN(
+        localeName = "bg",
+        text = "български".asText(),
+    ),
+    CATALAN(
+        localeName = "ca",
+        text = "català".asText(),
+    ),
+    CZECH(
+        localeName = "cs",
+        text = "čeština".asText(),
+    ),
+    DANISH(
+        localeName = "da",
+        text = "Dansk".asText(),
+    ),
+    GERMAN(
+        localeName = "de",
+        text = "Deutsch".asText(),
+    ),
+    GREEK(
+        localeName = "el",
+        text = "Ελληνικά".asText(),
+    ),
+    ENGLISH(
+        localeName = "en",
+        text = "English".asText(),
+    ),
+    ENGLISH_BRITISH(
+        localeName = "en-GB",
+        text = "English (British)".asText(),
+    ),
+    SPANISH(
+        localeName = "es",
+        text = "Español".asText(),
+    ),
+    ESTONIAN(
+        localeName = "et",
+        text = "eesti".asText(),
+    ),
+    PERSIAN(
+        localeName = "fa",
+        text = "فارسی".asText(),
+    ),
+    FINNISH(
+        localeName = "fi",
+        text = "suomi".asText(),
+    ),
+    FRENCH(
+        localeName = "fr",
+        text = "Français".asText(),
+    ),
+    HINDI(
+        localeName = "hi",
+        text = "हिन्दी".asText(),
+    ),
+    CROATIAN(
+        localeName = "hr",
+        text = "hrvatski".asText(),
+    ),
+    HUNGARIAN(
+        localeName = "hu",
+        text = "magyar".asText(),
+    ),
+    INDONESIAN(
+        localeName = "in",
+        text = "Bahasa Indonesia".asText(),
+    ),
+    ITALIAN(
+        localeName = "it",
+        text = "Italiano".asText(),
+    ),
+    HEBREW(
+        localeName = "iw",
+        text = "עברית".asText(),
+    ),
+    JAPANESE(
+        localeName = "ja",
+        text = "日本語".asText(),
+    ),
+    KOREAN(
+        localeName = "ko",
+        text = "한국어".asText(),
+    ),
+    LATVIAN(
+        localeName = "lv",
+        text = "Latvietis".asText(),
+    ),
+    MALAYALAM(
+        localeName = "ml",
+        text = "മലയാളം".asText(),
+    ),
+    NORWEGIAN(
+        localeName = "nb",
+        text = "norsk (bokmål)".asText(),
+    ),
+    DUTCH(
+        localeName = "nl",
+        text = "Nederlands".asText(),
+    ),
+    POLISH(
+        localeName = "pl",
+        text = "Polski".asText(),
+    ),
+    PORTUGUESE_BRAZILIAN(
+        localeName = "pt-BR",
+        text = "Português do Brasil".asText(),
+    ),
+    PORTUGUESE(
+        localeName = "pt-PT",
+        text = "Português".asText(),
+    ),
+    ROMANIAN(
+        localeName = "ro",
+        text = "română".asText(),
+    ),
+    RUSSIAN(
+        localeName = "ru",
+        text = "русский".asText(),
+    ),
+    SLOVAK(
+        localeName = "sk",
+        text = "slovenčina".asText(),
+    ),
+    SWEDISH(
+        localeName = "sv",
+        text = "svenska".asText(),
+    ),
+    THAI(
+        localeName = "th",
+        text = "ไทย".asText(),
+    ),
+    TURKISH(
+        localeName = "tr",
+        text = "Türkçe".asText(),
+    ),
+    UKRAINIAN(
+        localeName = "uk",
+        text = "українська".asText(),
+    ),
+    VIETNAMESE(
+        localeName = "vi",
+        text = "Tiếng Việt".asText(),
+    ),
+    CHINESE_SIMPLIFIED(
+        localeName = "zh-CN",
+        text = "中文（中国大陆）".asText(),
+    ),
+    CHINESE_TRADITIONAL(
+        localeName = "zh-TW",
+        text = "中文（台灣）".asText(),
+    ),
+}
diff --git a/app/src/main/res/values-af-rZA/strings.xml b/app/src/main/res/values-af/strings.xml
similarity index 100%
rename from app/src/main/res/values-af-rZA/strings.xml
rename to app/src/main/res/values-af/strings.xml
diff --git a/app/src/main/res/values-ar-rSA/strings.xml b/app/src/main/res/values-ar/strings.xml
similarity index 100%
rename from app/src/main/res/values-ar-rSA/strings.xml
rename to app/src/main/res/values-ar/strings.xml
diff --git a/app/src/main/res/values-az-rAZ/strings.xml b/app/src/main/res/values-az/strings.xml
similarity index 100%
rename from app/src/main/res/values-az-rAZ/strings.xml
rename to app/src/main/res/values-az/strings.xml
diff --git a/app/src/main/res/values-be-rBY/strings.xml b/app/src/main/res/values-be/strings.xml
similarity index 100%
rename from app/src/main/res/values-be-rBY/strings.xml
rename to app/src/main/res/values-be/strings.xml
diff --git a/app/src/main/res/values-bg-rBG/strings.xml b/app/src/main/res/values-bg/strings.xml
similarity index 100%
rename from app/src/main/res/values-bg-rBG/strings.xml
rename to app/src/main/res/values-bg/strings.xml
diff --git a/app/src/main/res/values-bn-rBD/strings.xml b/app/src/main/res/values-bn/strings.xml
similarity index 100%
rename from app/src/main/res/values-bn-rBD/strings.xml
rename to app/src/main/res/values-bn/strings.xml
diff --git a/app/src/main/res/values-bs-rBA/strings.xml b/app/src/main/res/values-bs/strings.xml
similarity index 100%
rename from app/src/main/res/values-bs-rBA/strings.xml
rename to app/src/main/res/values-bs/strings.xml
diff --git a/app/src/main/res/values-ca-rES/strings.xml b/app/src/main/res/values-ca/strings.xml
similarity index 100%
rename from app/src/main/res/values-ca-rES/strings.xml
rename to app/src/main/res/values-ca/strings.xml
diff --git a/app/src/main/res/values-cs-rCZ/strings.xml b/app/src/main/res/values-cs/strings.xml
similarity index 100%
rename from app/src/main/res/values-cs-rCZ/strings.xml
rename to app/src/main/res/values-cs/strings.xml
diff --git a/app/src/main/res/values-cy-rGB/strings.xml b/app/src/main/res/values-cy/strings.xml
similarity index 100%
rename from app/src/main/res/values-cy-rGB/strings.xml
rename to app/src/main/res/values-cy/strings.xml
diff --git a/app/src/main/res/values-da-rDK/strings.xml b/app/src/main/res/values-da/strings.xml
similarity index 100%
rename from app/src/main/res/values-da-rDK/strings.xml
rename to app/src/main/res/values-da/strings.xml
diff --git a/app/src/main/res/values-de-rDE/strings.xml b/app/src/main/res/values-de/strings.xml
similarity index 100%
rename from app/src/main/res/values-de-rDE/strings.xml
rename to app/src/main/res/values-de/strings.xml
diff --git a/app/src/main/res/values-el-rGR/strings.xml b/app/src/main/res/values-el/strings.xml
similarity index 100%
rename from app/src/main/res/values-el-rGR/strings.xml
rename to app/src/main/res/values-el/strings.xml
diff --git a/app/src/main/res/values-es-rES/strings.xml b/app/src/main/res/values-es/strings.xml
similarity index 100%
rename from app/src/main/res/values-es-rES/strings.xml
rename to app/src/main/res/values-es/strings.xml
diff --git a/app/src/main/res/values-et-rEE/strings.xml b/app/src/main/res/values-et/strings.xml
similarity index 100%
rename from app/src/main/res/values-et-rEE/strings.xml
rename to app/src/main/res/values-et/strings.xml
diff --git a/app/src/main/res/values-eu-rES/strings.xml b/app/src/main/res/values-eu/strings.xml
similarity index 100%
rename from app/src/main/res/values-eu-rES/strings.xml
rename to app/src/main/res/values-eu/strings.xml
diff --git a/app/src/main/res/values-fa-rIR/strings.xml b/app/src/main/res/values-fa/strings.xml
similarity index 100%
rename from app/src/main/res/values-fa-rIR/strings.xml
rename to app/src/main/res/values-fa/strings.xml
diff --git a/app/src/main/res/values-fi-rFI/strings.xml b/app/src/main/res/values-fi/strings.xml
similarity index 100%
rename from app/src/main/res/values-fi-rFI/strings.xml
rename to app/src/main/res/values-fi/strings.xml
diff --git a/app/src/main/res/values-fil-rPH/strings.xml b/app/src/main/res/values-fil/strings.xml
similarity index 100%
rename from app/src/main/res/values-fil-rPH/strings.xml
rename to app/src/main/res/values-fil/strings.xml
diff --git a/app/src/main/res/values-fr-rFR/strings.xml b/app/src/main/res/values-fr/strings.xml
similarity index 100%
rename from app/src/main/res/values-fr-rFR/strings.xml
rename to app/src/main/res/values-fr/strings.xml
diff --git a/app/src/main/res/values-gl-rES/strings.xml b/app/src/main/res/values-gl/strings.xml
similarity index 100%
rename from app/src/main/res/values-gl-rES/strings.xml
rename to app/src/main/res/values-gl/strings.xml
diff --git a/app/src/main/res/values-hi-rIN/strings.xml b/app/src/main/res/values-hi/strings.xml
similarity index 100%
rename from app/src/main/res/values-hi-rIN/strings.xml
rename to app/src/main/res/values-hi/strings.xml
diff --git a/app/src/main/res/values-hr-rHR/strings.xml b/app/src/main/res/values-hr/strings.xml
similarity index 100%
rename from app/src/main/res/values-hr-rHR/strings.xml
rename to app/src/main/res/values-hr/strings.xml
diff --git a/app/src/main/res/values-hu-rHU/strings.xml b/app/src/main/res/values-hu/strings.xml
similarity index 100%
rename from app/src/main/res/values-hu-rHU/strings.xml
rename to app/src/main/res/values-hu/strings.xml
diff --git a/app/src/main/res/values-in-rID/strings.xml b/app/src/main/res/values-in/strings.xml
similarity index 100%
rename from app/src/main/res/values-in-rID/strings.xml
rename to app/src/main/res/values-in/strings.xml
diff --git a/app/src/main/res/values-it-rIT/strings.xml b/app/src/main/res/values-it/strings.xml
similarity index 100%
rename from app/src/main/res/values-it-rIT/strings.xml
rename to app/src/main/res/values-it/strings.xml
diff --git a/app/src/main/res/values-iw-rIL/strings.xml b/app/src/main/res/values-iw/strings.xml
similarity index 100%
rename from app/src/main/res/values-iw-rIL/strings.xml
rename to app/src/main/res/values-iw/strings.xml
diff --git a/app/src/main/res/values-ja-rJP/strings.xml b/app/src/main/res/values-ja/strings.xml
similarity index 100%
rename from app/src/main/res/values-ja-rJP/strings.xml
rename to app/src/main/res/values-ja/strings.xml
diff --git a/app/src/main/res/values-ka-rGE/strings.xml b/app/src/main/res/values-ka/strings.xml
similarity index 100%
rename from app/src/main/res/values-ka-rGE/strings.xml
rename to app/src/main/res/values-ka/strings.xml
diff --git a/app/src/main/res/values-kn-rIN/strings.xml b/app/src/main/res/values-kn/strings.xml
similarity index 100%
rename from app/src/main/res/values-kn-rIN/strings.xml
rename to app/src/main/res/values-kn/strings.xml
diff --git a/app/src/main/res/values-ko-rKR/strings.xml b/app/src/main/res/values-ko/strings.xml
similarity index 100%
rename from app/src/main/res/values-ko-rKR/strings.xml
rename to app/src/main/res/values-ko/strings.xml
diff --git a/app/src/main/res/values-lt-rLT/strings.xml b/app/src/main/res/values-lt/strings.xml
similarity index 100%
rename from app/src/main/res/values-lt-rLT/strings.xml
rename to app/src/main/res/values-lt/strings.xml
diff --git a/app/src/main/res/values-lv-rLV/strings.xml b/app/src/main/res/values-lv/strings.xml
similarity index 100%
rename from app/src/main/res/values-lv-rLV/strings.xml
rename to app/src/main/res/values-lv/strings.xml
diff --git a/app/src/main/res/values-ml-rIN/strings.xml b/app/src/main/res/values-ml/strings.xml
similarity index 100%
rename from app/src/main/res/values-ml-rIN/strings.xml
rename to app/src/main/res/values-ml/strings.xml
diff --git a/app/src/main/res/values-mr-rIN/strings.xml b/app/src/main/res/values-mr/strings.xml
similarity index 100%
rename from app/src/main/res/values-mr-rIN/strings.xml
rename to app/src/main/res/values-mr/strings.xml
diff --git a/app/src/main/res/values-my-rMM/strings.xml b/app/src/main/res/values-my/strings.xml
similarity index 100%
rename from app/src/main/res/values-my-rMM/strings.xml
rename to app/src/main/res/values-my/strings.xml
diff --git a/app/src/main/res/values-nb-rNO/strings.xml b/app/src/main/res/values-nb/strings.xml
similarity index 100%
rename from app/src/main/res/values-nb-rNO/strings.xml
rename to app/src/main/res/values-nb/strings.xml
diff --git a/app/src/main/res/values-ne-rNP/strings.xml b/app/src/main/res/values-ne/strings.xml
similarity index 100%
rename from app/src/main/res/values-ne-rNP/strings.xml
rename to app/src/main/res/values-ne/strings.xml
diff --git a/app/src/main/res/values-nl-rNL/strings.xml b/app/src/main/res/values-nl/strings.xml
similarity index 100%
rename from app/src/main/res/values-nl-rNL/strings.xml
rename to app/src/main/res/values-nl/strings.xml
diff --git a/app/src/main/res/values-nn-rNO/strings.xml b/app/src/main/res/values-nn/strings.xml
similarity index 100%
rename from app/src/main/res/values-nn-rNO/strings.xml
rename to app/src/main/res/values-nn/strings.xml
diff --git a/app/src/main/res/values-or-rIN/strings.xml b/app/src/main/res/values-or/strings.xml
similarity index 100%
rename from app/src/main/res/values-or-rIN/strings.xml
rename to app/src/main/res/values-or/strings.xml
diff --git a/app/src/main/res/values-pl-rPL/strings.xml b/app/src/main/res/values-pl/strings.xml
similarity index 100%
rename from app/src/main/res/values-pl-rPL/strings.xml
rename to app/src/main/res/values-pl/strings.xml
diff --git a/app/src/main/res/values-ro-rRO/strings.xml b/app/src/main/res/values-ro/strings.xml
similarity index 100%
rename from app/src/main/res/values-ro-rRO/strings.xml
rename to app/src/main/res/values-ro/strings.xml
diff --git a/app/src/main/res/values-ru-rRU/strings.xml b/app/src/main/res/values-ru/strings.xml
similarity index 100%
rename from app/src/main/res/values-ru-rRU/strings.xml
rename to app/src/main/res/values-ru/strings.xml
diff --git a/app/src/main/res/values-si-rLK/strings.xml b/app/src/main/res/values-si/strings.xml
similarity index 100%
rename from app/src/main/res/values-si-rLK/strings.xml
rename to app/src/main/res/values-si/strings.xml
diff --git a/app/src/main/res/values-sk-rSK/strings.xml b/app/src/main/res/values-sk/strings.xml
similarity index 100%
rename from app/src/main/res/values-sk-rSK/strings.xml
rename to app/src/main/res/values-sk/strings.xml
diff --git a/app/src/main/res/values-sl-rSI/strings.xml b/app/src/main/res/values-sl/strings.xml
similarity index 100%
rename from app/src/main/res/values-sl-rSI/strings.xml
rename to app/src/main/res/values-sl/strings.xml
diff --git a/app/src/main/res/values-sr-rSP/strings.xml b/app/src/main/res/values-sr/strings.xml
similarity index 100%
rename from app/src/main/res/values-sr-rSP/strings.xml
rename to app/src/main/res/values-sr/strings.xml
diff --git a/app/src/main/res/values-sv-rSE/strings.xml b/app/src/main/res/values-sv/strings.xml
similarity index 100%
rename from app/src/main/res/values-sv-rSE/strings.xml
rename to app/src/main/res/values-sv/strings.xml
diff --git a/app/src/main/res/values-ta-rIN/strings.xml b/app/src/main/res/values-ta/strings.xml
similarity index 100%
rename from app/src/main/res/values-ta-rIN/strings.xml
rename to app/src/main/res/values-ta/strings.xml
diff --git a/app/src/main/res/values-te-rIN/strings.xml b/app/src/main/res/values-te/strings.xml
similarity index 100%
rename from app/src/main/res/values-te-rIN/strings.xml
rename to app/src/main/res/values-te/strings.xml
diff --git a/app/src/main/res/values-th-rTH/strings.xml b/app/src/main/res/values-th/strings.xml
similarity index 100%
rename from app/src/main/res/values-th-rTH/strings.xml
rename to app/src/main/res/values-th/strings.xml
diff --git a/app/src/main/res/values-tr-rTR/strings.xml b/app/src/main/res/values-tr/strings.xml
similarity index 100%
rename from app/src/main/res/values-tr-rTR/strings.xml
rename to app/src/main/res/values-tr/strings.xml
diff --git a/app/src/main/res/values-uk-rUA/strings.xml b/app/src/main/res/values-uk/strings.xml
similarity index 100%
rename from app/src/main/res/values-uk-rUA/strings.xml
rename to app/src/main/res/values-uk/strings.xml
diff --git a/app/src/main/res/values-vi-rVN/strings.xml b/app/src/main/res/values-vi/strings.xml
similarity index 100%
rename from app/src/main/res/values-vi-rVN/strings.xml
rename to app/src/main/res/values-vi/strings.xml
diff --git a/app/src/main/res/values/styles.xml b/app/src/main/res/values/styles.xml
index 0c1a56ce8..4c5b16f9f 100644
--- a/app/src/main/res/values/styles.xml
+++ b/app/src/main/res/values/styles.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
 
-    <style name="BaseTheme" parent="android:Theme.Material.Light.DarkActionBar">
+    <style name="BaseTheme" parent="Theme.Design.Light.NoActionBar">
         <item name="android:navigationBarColor">@android:color/transparent</item>
         <item name="android:statusBarColor">@android:color/transparent</item>
         <item name="android:textCursorDrawable">@null</item>
diff --git a/app/src/main/res/xml/locales_config.xml b/app/src/main/res/xml/locales_config.xml
new file mode 100644
index 000000000..0a3c32a9a
--- /dev/null
+++ b/app/src/main/res/xml/locales_config.xml
@@ -0,0 +1,43 @@
+<?xml version="1.0" encoding="utf-8"?>
+<locale-config xmlns:android="http://schemas.android.com/apk/res/android">
+    <locale android:name="af"/> <!-- Afrikaans -->
+    <locale android:name="be"/> <!-- Belarusian -->
+    <locale android:name="bg"/> <!-- Bulgarian -->
+    <locale android:name="ca"/> <!-- Catalan -->
+    <locale android:name="cs"/> <!-- Czech -->
+    <locale android:name="da"/> <!-- Danish -->
+    <locale android:name="de"/> <!-- German -->
+    <locale android:name="el"/> <!-- Greek -->
+    <locale android:name="en"/> <!-- English (US) -->
+    <locale android:name="en-GB"/> <!-- English (Great Britain) -->
+    <locale android:name="es"/> <!-- Spanish -->
+    <locale android:name="et"/> <!-- Estonian -->
+    <locale android:name="fa"/> <!-- Persian -->
+    <locale android:name="fi"/> <!-- Finnish -->
+    <locale android:name="fr"/> <!-- French -->
+    <locale android:name="hi"/> <!-- Hindi -->
+    <locale android:name="hr"/> <!-- Croatian -->
+    <locale android:name="hu"/> <!-- Hungarian -->
+    <locale android:name="in"/> <!-- Indonesian -->
+    <locale android:name="it"/> <!-- Italian -->
+    <locale android:name="iw"/> <!-- Hebrew -->
+    <locale android:name="ja"/> <!-- Japanese -->
+    <locale android:name="ko"/> <!-- Korean -->
+    <locale android:name="lv"/> <!-- Latvian -->
+    <locale android:name="ml"/> <!-- Malayalam -->
+    <locale android:name="nb"/> <!-- Norwegian -->
+    <locale android:name="nl"/> <!-- Dutch -->
+    <locale android:name="pl"/> <!-- Polish -->
+    <locale android:name="pt-BR"/> <!-- Portuguese (Brazilian) -->
+    <locale android:name="pt-PT"/> <!-- Portuguese (Portugal) -->
+    <locale android:name="ro"/> <!-- Romanian -->
+    <locale android:name="ru"/> <!-- Russian -->
+    <locale android:name="sk"/> <!-- Slovak -->
+    <locale android:name="sv"/> <!-- Swedish -->
+    <locale android:name="th"/> <!-- Thai -->
+    <locale android:name="tr"/> <!-- Turkish -->
+    <locale android:name="uk"/> <!-- Ukrainian -->
+    <locale android:name="vi"/> <!-- Vietnamese -->
+    <locale android:name="zh-CN"/> <!-- Chinese (Simplified) -->
+    <locale android:name="zh-TW"/> <!-- Chinese (Traditional) -->
+</locale-config>
diff --git a/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceTest.kt b/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceTest.kt
index 5de47ca20..ac7494114 100644
--- a/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceTest.kt
+++ b/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/SettingsDiskSourceTest.kt
@@ -4,6 +4,7 @@ import androidx.core.content.edit
 import app.cash.turbine.test
 import com.x8bit.bitwarden.data.platform.base.FakeSharedPreferences
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeoutAction
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import kotlinx.coroutines.test.runTest
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Assertions.assertFalse
@@ -18,6 +19,45 @@ class SettingsDiskSourceTest {
         sharedPreferences = fakeSharedPreferences,
     )
 
+    @Test
+    fun `appLanguage should pull from SharedPreferences`() {
+        val appLanguageKey = "bwPreferencesStorage:appLocale"
+        val expected = AppLanguage.AFRIKAANS
+
+        // Verify initial value is null and disk source matches shared preferences.
+        assertNull(fakeSharedPreferences.getString(appLanguageKey, null))
+        assertNull(settingsDiskSource.appLanguage)
+
+        // Updating the shared preferences should update disk source.
+        fakeSharedPreferences
+            .edit()
+            .putString(
+                appLanguageKey,
+                expected.localeName,
+            )
+            .apply()
+        val actual = settingsDiskSource.appLanguage
+        assertEquals(
+            expected,
+            actual,
+        )
+    }
+
+    @Test
+    fun `setting appLanguage should update SharedPreferences`() {
+        val appLanguageKey = "bwPreferencesStorage:appLocale"
+        val appLanguage = AppLanguage.ENGLISH
+        settingsDiskSource.appLanguage = appLanguage
+        val actual = fakeSharedPreferences.getString(
+            appLanguageKey,
+            AppLanguage.DEFAULT.localeName,
+        )
+        assertEquals(
+            appLanguage.localeName,
+            actual,
+        )
+    }
+
     @Test
     fun `getVaultTimeoutInMinutes when values are present should pull from SharedPreferences`() {
         val vaultTimeoutBaseKey = "bwPreferencesStorage:vaultTimeout"
@@ -44,22 +84,23 @@ class SettingsDiskSourceTest {
     }
 
     @Test
-    fun `getVaultTimeoutInMinutesFlow should react to changes in getOrganizations`() = runTest {
-        val mockUserId = "mockUserId"
-        val vaultTimeoutInMinutes = 360
-        settingsDiskSource.getVaultTimeoutInMinutesFlow(userId = mockUserId).test {
-            // The initial values of the Flow and the property are in sync
-            assertNull(settingsDiskSource.getVaultTimeoutInMinutes(userId = mockUserId))
-            assertNull(awaitItem())
+    fun `getVaultTimeoutInMinutesFlow should react to changes in getVaultTimeoutInMinutes`() =
+        runTest {
+            val mockUserId = "mockUserId"
+            val vaultTimeoutInMinutes = 360
+            settingsDiskSource.getVaultTimeoutInMinutesFlow(userId = mockUserId).test {
+                // The initial values of the Flow and the property are in sync
+                assertNull(settingsDiskSource.getVaultTimeoutInMinutes(userId = mockUserId))
+                assertNull(awaitItem())
 
-            // Updating the repository updates shared preferences
-            settingsDiskSource.storeVaultTimeoutInMinutes(
-                userId = mockUserId,
-                vaultTimeoutInMinutes = vaultTimeoutInMinutes,
-            )
-            assertEquals(vaultTimeoutInMinutes, awaitItem())
+                // Updating the repository updates shared preferences
+                settingsDiskSource.storeVaultTimeoutInMinutes(
+                    userId = mockUserId,
+                    vaultTimeoutInMinutes = vaultTimeoutInMinutes,
+                )
+                assertEquals(vaultTimeoutInMinutes, awaitItem())
+            }
         }
-    }
 
     @Test
     fun `storeVaultTimeoutInMinutes for non-null values should update SharedPreferences`() {
@@ -123,7 +164,7 @@ class SettingsDiskSourceTest {
     }
 
     @Test
-    fun `getVaultTimeoutActionFlow should react to changes in getOrganizations`() = runTest {
+    fun `getVaultTimeoutActionFlow should react to changes in getVaultTimeoutAction`() = runTest {
         val mockUserId = "mockUserId"
         val vaultTimeoutAction = VaultTimeoutAction.LOCK
         settingsDiskSource.getVaultTimeoutActionFlow(userId = mockUserId).test {
diff --git a/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/util/FakeSettingsDiskSource.kt b/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/util/FakeSettingsDiskSource.kt
index 851d355a5..338df7eac 100644
--- a/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/util/FakeSettingsDiskSource.kt
+++ b/app/src/test/java/com/x8bit/bitwarden/data/platform/datasource/disk/util/FakeSettingsDiskSource.kt
@@ -3,6 +3,7 @@ package com.x8bit.bitwarden.data.platform.datasource.disk.util
 import com.x8bit.bitwarden.data.platform.datasource.disk.SettingsDiskSource
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeoutAction
 import com.x8bit.bitwarden.data.platform.repository.util.bufferedMutableSharedFlow
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.onSubscription
@@ -21,6 +22,8 @@ class FakeSettingsDiskSource : SettingsDiskSource {
     private val storedVaultTimeoutActions = mutableMapOf<String, VaultTimeoutAction?>()
     private val storedVaultTimeoutInMinutes = mutableMapOf<String, Int?>()
 
+    override var appLanguage: AppLanguage? = null
+
     override fun getVaultTimeoutInMinutes(userId: String): Int? =
         storedVaultTimeoutInMinutes[userId]
 
diff --git a/app/src/test/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryTest.kt b/app/src/test/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryTest.kt
index 7911ef6c9..3ee7cc1a6 100644
--- a/app/src/test/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryTest.kt
+++ b/app/src/test/java/com/x8bit/bitwarden/data/platform/repository/SettingsRepositoryTest.kt
@@ -6,6 +6,7 @@ import com.x8bit.bitwarden.data.platform.base.FakeDispatcherManager
 import com.x8bit.bitwarden.data.platform.datasource.disk.util.FakeSettingsDiskSource
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeout
 import com.x8bit.bitwarden.data.platform.repository.model.VaultTimeoutAction
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import io.mockk.every
 import io.mockk.mockk
 import kotlinx.coroutines.test.runTest
@@ -87,6 +88,28 @@ class SettingsRepositoryTest {
         )
     }
 
+    @Test
+    fun `appLanguage should pull from and update SettingsDiskSource`() {
+        assertEquals(
+            AppLanguage.DEFAULT,
+            settingsRepository.appLanguage,
+        )
+
+        // Updates to the disk source change the repository value.
+        fakeSettingsDiskSource.appLanguage = AppLanguage.ENGLISH
+        assertEquals(
+            AppLanguage.ENGLISH,
+            settingsRepository.appLanguage,
+        )
+
+        // Updates to the repository value change the disk source.
+        settingsRepository.appLanguage = AppLanguage.DUTCH
+        assertEquals(
+            AppLanguage.DUTCH,
+            fakeSettingsDiskSource.appLanguage,
+        )
+    }
+
     @Test
     fun `vaultTimeout should pull from and update SettingsDiskSource for the current user`() {
         every { authDiskSource.userState?.activeUserId } returns null
diff --git a/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreenTest.kt b/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreenTest.kt
index 073f8331a..cf5e8c2fb 100644
--- a/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreenTest.kt
+++ b/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceScreenTest.kt
@@ -1,6 +1,7 @@
 package com.x8bit.bitwarden.ui.platform.feature.settings.appearance
 
 import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.assertIsNotDisplayed
 import androidx.compose.ui.test.filterToOne
 import androidx.compose.ui.test.hasAnyAncestor
 import androidx.compose.ui.test.isDialog
@@ -10,6 +11,7 @@ import androidx.compose.ui.test.onNodeWithText
 import androidx.compose.ui.test.performClick
 import com.x8bit.bitwarden.data.platform.repository.util.bufferedMutableSharedFlow
 import com.x8bit.bitwarden.ui.platform.base.BaseComposeTest
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
 import com.x8bit.bitwarden.ui.util.assertNoDialogExists
 import io.mockk.every
 import io.mockk.mockk
@@ -55,10 +57,26 @@ class AppearanceScreenTest : BaseComposeTest() {
     }
 
     @Test
-    fun `on language selection dialog item click should send LanguageChange`() {
+    fun `on language selection dialog item click should send LanguageChange and show dialog`() {
+        // Clicking the Language row shows the language selection dialog
         composeTestRule.onNodeWithText("Language").performClick()
+        // Selecting a language dismisses this dialog and displays the confirmation
         composeTestRule
-            .onAllNodesWithText("English")
+            .onAllNodesWithText("Afrikaans")
+            .filterToOne(hasAnyAncestor(isDialog()))
+            .performClick()
+        composeTestRule
+            .onAllNodesWithText("Afrikaans")
+            .filterToOne(hasAnyAncestor(isDialog()))
+            .assertIsNotDisplayed()
+
+        // Should show confirmation dialog
+        composeTestRule
+            .onAllNodesWithText("Ok")
+            .filterToOne(hasAnyAncestor(isDialog()))
+            .assertIsDisplayed()
+        // Clicking "Ok" should dismiss confirmation dialog
+        composeTestRule.onAllNodesWithText("Ok")
             .filterToOne(hasAnyAncestor(isDialog()))
             .performClick()
         composeTestRule.assertNoDialogExists()
@@ -66,7 +84,7 @@ class AppearanceScreenTest : BaseComposeTest() {
         verify {
             viewModel.trySendAction(
                 AppearanceAction.LanguageChange(
-                    language = AppearanceState.Language.ENGLISH,
+                    language = AppLanguage.AFRIKAANS,
                 ),
             )
         }
@@ -133,7 +151,7 @@ class AppearanceScreenTest : BaseComposeTest() {
 }
 
 private val DEFAULT_STATE = AppearanceState(
-    language = AppearanceState.Language.DEFAULT,
+    language = AppLanguage.DEFAULT,
     showWebsiteIcons = false,
     theme = AppearanceState.Theme.DEFAULT,
 )
diff --git a/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModelTest.kt b/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModelTest.kt
index 51f53c73c..f5990ac67 100644
--- a/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModelTest.kt
+++ b/app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModelTest.kt
@@ -1,13 +1,40 @@
 package com.x8bit.bitwarden.ui.platform.feature.settings.appearance
 
+import androidx.appcompat.app.AppCompatDelegate
 import androidx.lifecycle.SavedStateHandle
 import app.cash.turbine.test
+import com.x8bit.bitwarden.data.platform.repository.SettingsRepository
 import com.x8bit.bitwarden.ui.platform.base.BaseViewModelTest
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
+import io.mockk.every
+import io.mockk.just
+import io.mockk.mockk
+import io.mockk.mockkStatic
+import io.mockk.runs
+import io.mockk.unmockkStatic
+import io.mockk.verify
 import kotlinx.coroutines.test.runTest
+import org.junit.jupiter.api.AfterEach
 import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.BeforeEach
 import org.junit.jupiter.api.Test
 
 class AppearanceViewModelTest : BaseViewModelTest() {
+    private val mockSettingsRepository = mockk<SettingsRepository> {
+        every { appLanguage } returns AppLanguage.DEFAULT
+        every { appLanguage = AppLanguage.ENGLISH } just runs
+    }
+
+    @BeforeEach
+    fun setup() {
+        mockkStatic(AppCompatDelegate::setApplicationLocales)
+    }
+
+    @AfterEach
+    fun teardown() {
+        unmockkStatic(AppCompatDelegate::setApplicationLocales)
+    }
+
     @Test
     fun `initial state should be correct when not set`() {
         val viewModel = createViewModel(state = null)
@@ -31,21 +58,30 @@ class AppearanceViewModelTest : BaseViewModelTest() {
     }
 
     @Test
-    fun `on LanguageChange should update state`() = runTest {
-        val viewModel = createViewModel()
+    fun `on LanguageChange should update state and store language`() = runTest {
+        val viewModel = createViewModel(
+            settingsRepository = mockSettingsRepository,
+        )
         viewModel.stateFlow.test {
             assertEquals(
                 DEFAULT_STATE,
                 awaitItem(),
             )
             viewModel.trySendAction(
-                AppearanceAction.LanguageChange(AppearanceState.Language.ENGLISH),
+                AppearanceAction.LanguageChange(AppLanguage.ENGLISH),
             )
             assertEquals(
-                DEFAULT_STATE.copy(language = AppearanceState.Language.ENGLISH),
+                DEFAULT_STATE.copy(
+                    language = AppLanguage.ENGLISH,
+                ),
                 awaitItem(),
             )
         }
+        verify {
+            AppCompatDelegate.setApplicationLocales(any())
+            mockSettingsRepository.appLanguage
+            mockSettingsRepository.appLanguage = AppLanguage.ENGLISH
+        }
     }
 
     @Test
@@ -82,15 +118,17 @@ class AppearanceViewModelTest : BaseViewModelTest() {
 
     private fun createViewModel(
         state: AppearanceState? = null,
+        settingsRepository: SettingsRepository = mockSettingsRepository,
     ) = AppearanceViewModel(
         savedStateHandle = SavedStateHandle().apply {
             set("state", state)
         },
+        settingsRepository = settingsRepository,
     )
 
     companion object {
         private val DEFAULT_STATE = AppearanceState(
-            language = AppearanceState.Language.DEFAULT,
+            language = AppLanguage.DEFAULT,
             showWebsiteIcons = false,
             theme = AppearanceState.Theme.DEFAULT,
         )
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index cbc475602..d7bf470cd 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -23,6 +23,7 @@ androidxNavigation = "2.7.6"
 androidxRoom = "2.6.1"
 androidXSecurityCrypto = "1.1.0-alpha06"
 androidxSplash = "1.1.0-alpha02"
+androidXAppCompat = "1.6.1"
 # Once the app and SDK reach a critical point of completeness we should begin fixing the version
 # here (BIT-311).
 bitwardenSdk = "0.4.0-20240111.141006-33"
@@ -53,6 +54,7 @@ zxing = "3.5.2"
 [libraries]
 # Format: <maintainer>-<artifact-name>
 androidx-activity-compose = { module = "androidx.activity:activity-compose", version.ref = "androidxActivity" }
+androidx-appcompat = { group = "androidx.appcompat", name = "appcompat", version.ref = "androidXAppCompat" }
 androidx-browser = { module = "androidx.browser:browser", version.ref = "androidxBrowser" }
 androidx-camera-camera2 = { module = "androidx.camera:camera-camera2", version.ref = "androidxCamera" }
 androidx-camera-lifecycle = { group = "androidx.camera", name = "camera-lifecycle", version.ref = "androidxCamera" }