add missing German translations

Author: saschaszott

src/assets/i18n/de.json5

@@ -5226,6 +5226,12 @@
   // "submission.sections.describe.relationship-lookup.external-source.import-button-title.Journal Volume": "Import remote journal volume",
   "submission.sections.describe.relationship-lookup.external-source.import-button-title.Journal Volume": "Zeitschriftenband importieren",
 
+  // "submission.sections.describe.relationship-lookup.external-source.import-button-title.none": "Import remote item",
+  "submission.sections.describe.relationship-lookup.external-source.import-button-title.none": "Item importieren",
+
+  // "submission.sections.describe.relationship-lookup.external-source.import-button-title.Publication": "Import remote publication",
+  "submission.sections.describe.relationship-lookup.external-source.import-button-title.Publication": "Metadaten der Publikation importieren",
+
   // "submission.sections.describe.relationship-lookup.external-source.import-modal.isAuthorOfPublication.title": "Import Remote Author",
   "submission.sections.describe.relationship-lookup.external-source.import-modal.isAuthorOfPublication.title": "Importiere Autor:innen-Metadaten",