first language support

src/App.svelte

@@ -1,7 +1,9 @@
 <script>
   import { addMessages, init, getLocaleFromNavigator } from "svelte-i18n";
   import en from "./locales/en";
+  import de from "./locales/de";
   addMessages("en", en);
+  addMessages("de", de);
   init({
     fallbackLocale: "en",
     initialLocale: getLocaleFromNavigator(),