Add translations for transcriptions

backend/de/basis.json

@@ -104,6 +104,7 @@
         "image": "Bild",
         "menu_items": "Menu Items",
         "backgrounds": "Hintergr\u00fcnde",
-        "transcription": "Transkript"
+        "transcription": "Transkript",
+        "record_language": "Sprache des Eintrags"
     }
 }