diff --git a/integrationTesting/mockData/users/RosaLuxemburgUser.ts b/integrationTesting/mockData/users/RosaLuxemburgUser.ts
index 626c1c9977..93531f9f2e 100644
--- a/integrationTesting/mockData/users/RosaLuxemburgUser.ts
+++ b/integrationTesting/mockData/users/RosaLuxemburgUser.ts
@@ -3,6 +3,7 @@ import { ZetkinUser } from 'utils/types/zetkin';
 const RosaLuxemburgUser: ZetkinUser = {
   first_name: 'Rosa',
   id: 1,
+  lang: null,
   last_name: 'Luxemburg',
   username: 'red_rosa',
 };
diff --git a/src/utils/next.ts b/src/utils/next.ts
index bbe00fb52a..fb8b4bdb4b 100644
--- a/src/utils/next.ts
+++ b/src/utils/next.ts
@@ -189,7 +189,7 @@ export const scaffold =
     const result = (await wrapped(ctx)) || {};
 
     // Figure out browser's preferred language
-    const lang = getBrowserLanguage(contextFromNext.req);
+    const lang = ctx.user?.lang || getBrowserLanguage(contextFromNext.req);
 
     // TODO: Respect scope from options again
     //const localeScope = (options?.localeScope ?? []).concat(['misc', 'zui']);
diff --git a/src/utils/types/zetkin.ts b/src/utils/types/zetkin.ts
index b25ac9198b..b26892a184 100644
--- a/src/utils/types/zetkin.ts
+++ b/src/utils/types/zetkin.ts
@@ -132,6 +132,7 @@ export interface ZetkinUser {
   first_name: string;
   id: number;
   is_superuser?: boolean;
+  lang: string | null;
   last_name: string;
   username: string;
 }