diff --git a/customize.dist/translations/messages.fr.js b/customize.dist/translations/messages.fr.js
index dd646bc5d..9e738720b 100644
--- a/customize.dist/translations/messages.fr.js
+++ b/customize.dist/translations/messages.fr.js
@@ -22,7 +22,9 @@ define(function () {
     ].join('');
 
     out.common_connectionLost = "<b>Connexion au serveur perdue</b><br>Vous êtes désormais en mode lecture seule jusqu'au retour de la connexion.";
+
     out.websocketError = 'Impossible de se connecter au serveur WebSocket...';
+    out.typeError = "Ce document temps-réel n'est pas compatible avec l'application sélectionnée";
 
     out.loading = "Chargement...";
     out.error = "Erreur";
diff --git a/customize.dist/translations/messages.js b/customize.dist/translations/messages.js
index cfdfde7d4..4f53c1a00 100644
--- a/customize.dist/translations/messages.js
+++ b/customize.dist/translations/messages.js
@@ -28,6 +28,7 @@ define(function () {
     out.common_connectionLost = out.updated_common_connectionLostAndInfo;
 
     out.websocketError = 'Unable to connect to the websocket server...';
+    out.typeError = "That realtime document is not compatible with the selected application";
 
     out.loading = "Loading...";
     out.error = "Error";
diff --git a/www/code/main.js b/www/code/main.js
index 8595d3b2e..2e9d2f97b 100644
--- a/www/code/main.js
+++ b/www/code/main.js
@@ -558,7 +558,9 @@ define([
                     var hjson = JSON.parse(userDoc);
 
                     if (typeof (hjson) !== 'object' || Array.isArray(hjson)) {
-                        throw new Error("That realtime document is not compatible with the Code app");
+                        var errorText = Messages.typeError;
+                        Cryptpad.errorLoadingScreen(errorText);
+                        throw new Error(errorText);
                     }
 
                     newDoc = hjson.content;
diff --git a/www/slide/main.js b/www/slide/main.js
index 28b6d93e1..e903ea018 100644
--- a/www/slide/main.js
+++ b/www/slide/main.js
@@ -631,7 +631,9 @@ define([
                     newDoc = hjson.content;
 
                     if (typeof (hjson) !== 'object' || Array.isArray(hjson)) {
-                        throw new Error("That realtime document is not compatible with the Slide app");
+                        var errorText = Messages.typeError;
+                        Cryptpad.errorLoadingScreen(errorText);
+                        throw new Error(errorText);
                     }
 
                     if (hjson.highlightMode) {