i18n settings improvements (#2184)

* Handle language selector

* Improve type safety

* Add a little more safety

* Update comment

src/locale/i18n.ts

@@ -5,22 +5,21 @@ import {useLanguagePrefs} from '#/state/preferences'
 import {messages as messagesEn} from '#/locale/locales/en/messages'
 import {messages as messagesHi} from '#/locale/locales/hi/messages'
 import {sanitizeAppLanguageSetting} from '#/locale/helpers'
-
-export const locales = {
-  en: 'English',
-  hi: 'हिंदी',
-}
-export const defaultLocale = 'en'
+import {AppLanguage} from '#/locale/languages'
 
 /**
  * We do a dynamic import of just the catalog that we need
- * @param locale any locale string
  */
-export async function dynamicActivate(locale: string) {
-  if (locale === 'hi') {
-    i18n.loadAndActivate({locale, messages: messagesHi})
-  } else {
-    i18n.loadAndActivate({locale, messages: messagesEn})
+export async function dynamicActivate(locale: AppLanguage) {
+  switch (locale) {
+    case AppLanguage.hi: {
+      i18n.loadAndActivate({locale, messages: messagesHi})
+      break
+    }
+    default: {
+      i18n.loadAndActivate({locale, messages: messagesEn})
+      break
+    }
   }
 }