fix i18n

Author: previ

src/i18n/locales/de/messages.json

@@ -14,7 +14,7 @@
     "cancel": "stornieren",
     "error": "Fehler",
     "save_as": "Speichern unter...",
-    "speichern": "Speichern",
+    "save": "Speichern",
     "ok": "OK",
     "no": "nein",
     "yes": "ja",