Include support for translated string resources at device permission dialog because it contains hardcoded english strings.

lang/main-es.json

         "passwordNotSupported": "No se soporta $t(lockRoomPassword) en la reunión",
         "passwordNotSupportedTitle": "$t(lockRoomPasswordUppercase) no es compatible",
         "passwordRequired": "$t(lockRoomPasswordUppercase) necesario",
+        "permissionErrorTitle": "Permiso necesario",
+        "permissionCameraRequiredError": "El permiso de cámara es necesario para participar en conferencias con vídeo. Por favor, permítelo en Ajustes",
+        "permissionMicRequiredError": "El permiso de micrófono es necesario para participar en conferencias con sonido. Por favor, permítelo en Ajustes",
         "popupError": "Su navegador está bloqueando las ventanas emergentes de este sitio. Habilite las ventanas emergentes en la configuración de seguridad de su navegador y vuelva a intentarlo.",
         "popupErrorTitle": "Ventana emergente bloqueada",
         "readMore": "mas",

lang/main.json

         "passwordNotSupported": "Setting a meeting $t(lockRoomPassword) is not supported.",
         "passwordNotSupportedTitle": "$t(lockRoomPasswordUppercase) not supported",
         "passwordRequired": "$t(lockRoomPasswordUppercase) required",
+        "permissionErrorTitle": "Permission required",
+        "permissionCameraRequiredError": "Camera permission is required to participate in conferences with video. Please grant it in Settings",
+        "permissionMicRequiredError": "Microphone permission is required to participate in conferences with audio. Please grant it in Settings",
         "popupError": "Your browser is blocking pop-up windows from this site. Please enable pop-ups in your browser's security settings and try again.",
         "popupErrorTitle": "Pop-up blocked",
         "readMore": "more",

react/features/mobile/permissions/middleware.js

 
 import { Alert } from 'react-native';
 
-
 import { isRoomValid } from '../../base/conference';
+import { i18next } from '../../base/i18n';
 import { MiddlewareRegistry } from '../../base/redux';
 import { TRACK_CREATE_ERROR } from '../../base/tracks';
 
  * @returns {void}
  */
 function _alertPermissionErrorWithSettings(trackType) {
-    // TODO i18n
-    const deviceType = trackType === 'video' ? 'Camera' : 'Microphone';
-
     /* eslint-disable indent */
-
-    const message
-        = `${deviceType
-            } permission is required to participate in conferences with ${
-            trackType}. Please grant it in Settings.`;
-
+    const message = trackType === 'video'
+        ? i18next.t('dialog.permissionCameraRequiredError')
+        : i18next.t('dialog.permissionMicRequiredError');
     /* eslint-ensable indent */
 
     Alert.alert(
-        'Permission required',
+        i18next.t('dialog.permissionErrorTitle'),
         message,
         [
-            { text: 'Cancel' },
+            { text: i18next.t('dialog.Cancel') },
             {
                 onPress: openSettings,
-                text: 'Settings'
+                text: i18next.t('settings.title')
             }
         ],
         { cancelable: false });