diff --git a/patches/add-translations-for-server-errors/matrix-react-sdk+3.68.0.patch b/patches/add-translations-for-server-errors/matrix-react-sdk+3.68.0.patch
new file mode 100644
index 0000000000..f36e1feecb
--- /dev/null
+++ b/patches/add-translations-for-server-errors/matrix-react-sdk+3.68.0.patch
@@ -0,0 +1,17 @@
+diff --git a/node_modules/matrix-react-sdk/src/stores/RoomViewStore.tsx b/node_modules/matrix-react-sdk/src/stores/RoomViewStore.tsx
+index 47bc9b9..05902fd 100644
+--- a/node_modules/matrix-react-sdk/src/stores/RoomViewStore.tsx
++++ b/node_modules/matrix-react-sdk/src/stores/RoomViewStore.tsx
+@@ -581,6 +581,12 @@ export class RoomViewStore extends EventEmitter {
+         let description: ReactNode = err.message ? err.message : JSON.stringify(err);
+         logger.log("Failed to join room:", description);
+ 
++        /* :TCHAP: add this for a translation */
++        if (typeof description === 'string' && description.includes('You are not invited to this room')) {
++            description = _t("Access possible only by invitation of a member of the room.");
++        }
++        /* end :TCHAP: */
++
+         if (err.name === "ConnectionError") {
+             description = _t("There was an error joining.");
+         } else if (err.errcode === "M_INCOMPATIBLE_ROOM_VERSION") {
diff --git a/patches/patches.json b/patches/patches.json
index f167f77cc1..c306898dfa 100644
--- a/patches/patches.json
+++ b/patches/patches.json
@@ -233,5 +233,12 @@
             "src/stores/widgets/WidgetLayoutStore.ts",
             "src/utils/device/clientInformation.ts"
         ]
+    },
+    "add-translations-for-server-errors": {
+        "github-issue": "https://github.com/tchapgouv/tchap-web-v4/issues/485",
+        "package": "matrix-react-sdk",
+        "files": [
+            "src/stores/RoomViewStore.tsx"
+        ]
     }
 }
\ No newline at end of file
diff --git a/src/i18n/strings/tchap_translations.json b/src/i18n/strings/tchap_translations.json
index a6f7c59cc7..3d73b405e2 100644
--- a/src/i18n/strings/tchap_translations.json
+++ b/src/i18n/strings/tchap_translations.json
@@ -814,5 +814,13 @@
   "Generate a new code": {
     "fr": "Générer un nouveau code",
     "en": "Generate a new code"
+  },
+  "Failed to join": {
+    "fr": "Impossible de rejoindre ce salon",
+    "en": "Failed to join this room."
+  },
+  "Access possible only by invitation of a member of the room.": {
+    "fr": "Accès possible uniquement sur invitation d'un membre du salon.",
+    "en": "Access possible only by invitation of a member of the room."
   }
 }