diff --git a/Sources/Resources/Localizable.xcstrings b/Sources/Resources/Localizable.xcstrings
index eb735e4..b7c082e 100644
--- a/Sources/Resources/Localizable.xcstrings
+++ b/Sources/Resources/Localizable.xcstrings
@@ -1,6 +1,116 @@
 {
   "sourceLanguage" : "de",
   "strings" : {
+    "api.error.author_not_found" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Autor:in nicht gefunden." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Author not found." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Auteur·rice introuvable." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Autor/a no encontrado/a." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Autore/autrice non trovato/a." } }
+      }
+    },
+    "api.error.author_resolution_failed" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Autor:in konnte nicht angelegt werden." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Author could not be created." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "L'auteur·rice n'a pas pu être créé·e." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "No se pudo crear el autor/a." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Impossibile creare l'autore/autrice." } }
+      }
+    },
+    "api.error.duplicate" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Dieses Zitat existiert bereits im Korpus." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "This quote already exists in the corpus." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Cette citation existe déjà dans le corpus." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Esta cita ya existe en el corpus." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Questa citazione esiste già nel corpus." } }
+      }
+    },
+    "api.error.invalid_json" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Ungültige Daten." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Invalid data." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Données invalides." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Datos no válidos." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Dati non validi." } }
+      }
+    },
+    "api.error.invalid_status" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Ungültiger Status." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Invalid status." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Statut invalide." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Estado no válido." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Stato non valido." } }
+      }
+    },
+    "api.error.no_changes" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Keine Änderungen." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "No changes." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Aucun changement." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Sin cambios." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Nessuna modifica." } }
+      }
+    },
+    "api.error.not_found" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Nicht gefunden." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Not found." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Introuvable." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "No encontrado." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Non trovato." } }
+      }
+    },
+    "api.error.not_open" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Vorgang nicht mehr offen." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "No longer open." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Plus ouvert." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Ya no está abierto." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Non più aperto." } }
+      }
+    },
+    "api.error.revision_not_found" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Revision nicht gefunden." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Revision not found." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Révision introuvable." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Revisión no encontrada." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Revisione non trovata." } }
+      }
+    },
+    "api.error.unauthorized" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Nicht autorisiert. Bitte erneut anmelden." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Not authorised. Please sign in again." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Non autorisé. Reconnecte-toi." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "No autorizado. Inicia sesión de nuevo." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Non autorizzato. Accedi di nuovo." } }
+      }
+    },
+    "api.error.validation_failed" : {
+      "extractionState" : "manual",
+      "localizations" : {
+        "de" : { "stringUnit" : { "state" : "translated", "value" : "Validierung fehlgeschlagen." } },
+        "en" : { "stringUnit" : { "state" : "translated", "value" : "Validation failed." } },
+        "fr" : { "stringUnit" : { "state" : "translated", "value" : "Échec de la validation." } },
+        "es" : { "stringUnit" : { "state" : "translated", "value" : "Validación fallida." } },
+        "it" : { "stringUnit" : { "state" : "translated", "value" : "Convalida non riuscita." } }
+      }
+    },
     "Einstellungen — ζ-5 TODO" : {
 
     },