diff --git a/src/components/views/settings/EventIndexPanel.js b/src/components/views/settings/EventIndexPanel.js
index 8598a2a966..1fe18cb207 100644
--- a/src/components/views/settings/EventIndexPanel.js
+++ b/src/components/views/settings/EventIndexPanel.js
@@ -129,11 +129,13 @@ export default class EventIndexPanel extends React.Component {
             eventIndexingSettings = (
                 <div>
                     <div className='mx_SettingsTab_subsectionText'>
-                        {_t( "Securely cache encrypted messages locally for them " +
-                             "to appear in search results, using ")
-                        } {formatBytes(this.state.eventIndexSize, 0)}
-                        {_t( " to store messages from ")}
-                        {formatCountLong(this.state.roomCount)} {_t("rooms.")}
+                        {_t("Securely cache encrypted messages locally for them " +
+                             "to appear in search results, using %(size)s to store messages from %(count)s rooms.",
+                            {
+                                size: formatBytes(this.state.eventIndexSize, 0),
+                                count: formatCountLong(this.state.roomCount),
+                            },
+                        )}
                     </div>
                     <div>
                         <AccessibleButton kind="primary" onClick={this._onManage}>
diff --git a/src/i18n/strings/en_EN.json b/src/i18n/strings/en_EN.json
index 830d3cdee4..110c51163f 100644
--- a/src/i18n/strings/en_EN.json
+++ b/src/i18n/strings/en_EN.json
@@ -935,9 +935,8 @@
     "Failed to set display name": "Failed to set display name",
     "Encryption": "Encryption",
     "Individually verify each session used by a user to mark it as trusted, not trusting cross-signed devices.": "Individually verify each session used by a user to mark it as trusted, not trusting cross-signed devices.",
-    "Securely cache encrypted messages locally for them to appear in search results, using ": "Securely cache encrypted messages locally for them to appear in search results, using ",
-    " to store messages from ": " to store messages from ",
-    "rooms.": "rooms.",
+    "Securely cache encrypted messages locally for them to appear in search results, using %(size)s to store messages from %(count)s rooms.|one": "Securely cache encrypted messages locally for them to appear in search results, using %(size)s to store messages from %(count)s room.",
+    "Securely cache encrypted messages locally for them to appear in search results, using %(size)s to store messages from %(count)s rooms.|other": "Securely cache encrypted messages locally for them to appear in search results, using %(size)s to store messages from %(count)s rooms.",
     "Manage": "Manage",
     "Securely cache encrypted messages locally for them to appear in search results.": "Securely cache encrypted messages locally for them to appear in search results.",
     "%(brand)s is missing some components required for securely caching encrypted messages locally. If you'd like to experiment with this feature, build a custom %(brand)s Desktop with <nativeLink>search components added</nativeLink>.": "%(brand)s is missing some components required for securely caching encrypted messages locally. If you'd like to experiment with this feature, build a custom %(brand)s Desktop with <nativeLink>search components added</nativeLink>.",