Add translations for image annotations in frontend, explanation for

editing one in musdb

backend/tr/quality.json

@@ -57,6 +57,7 @@
         "quality_index": "Qualit\u00e4tsindex",
         "no_image": "Zum Objekt wurde noch kein Bild heraufgeladen.",
         "translations_exist": "One or more translation exist for the object",
-        "exhibition_assigned": "The object has been assigned to an object group"
+        "exhibition_assigned": "The object has been assigned to an object group",
+        "transcripts_exist": "One or more transcripts exist for the object"
     }
 }