diff --git a/assets/locales/en/backend.json b/assets/locales/en/backend.json
index f6348ee..b59150a 100644
--- a/assets/locales/en/backend.json
+++ b/assets/locales/en/backend.json
@@ -26,5 +26,9 @@
   },
   "illegalAction.fileWithTooManyPages": {
     "message": "Uploaded file contains too many pages. Maximum number of pages is 1000."
+  },
+  "illegalAction.typeDetectionOrConversionError": {
+    "message": "There is something wrong with the file you are trying to upload. We are unable to convert the file to PDF. We recommend that you save the file as a PDF before uploading it."
   }
+
 }
diff --git a/assets/locales/nb/backend.json b/assets/locales/nb/backend.json
index b921449..a118bef 100644
--- a/assets/locales/nb/backend.json
+++ b/assets/locales/nb/backend.json
@@ -26,6 +26,9 @@
   },
   "illegalAction.fileWithTooManyPages": {
     "message": "Filen du lastet opp har for mange sider. Det kan være maksimalt 1000 sider."
+  },
+  "illegalAction.typeDetectionOrConversionError": {
+    "message": "Det er noe galt med filen du prøver å laste opp. Vi klarer ikke konvertere filen til PDF. Vi anbefaler at du lagrer filen som PDF selv før du laster den opp."
   }
-   
+
 }
diff --git a/assets/locales/nn/backend.json b/assets/locales/nn/backend.json
index c2b1ff5..49aee66 100644
--- a/assets/locales/nn/backend.json
+++ b/assets/locales/nn/backend.json
@@ -26,5 +26,8 @@
   },
   "illegalAction.fileWithTooManyPages": {
     "message": "Fila du lasta opp har for mange sider. Det kan vere maksimalt 1000 sider."
+  },
+  "illegalAction.typeDetectionOrConversionError": {
+    "message": "Det er noko gale med fila du prøver å laste opp. Me klarer ikkje konvertere fila til PDF. Me tilrår at du lagrar fila som PDF sjølv før du lastar den opp."
   }
 }