Since [1] the redirection supposed to happen after a lang install from the frontend was broken. Indeed, the 'url_return' was moved and used before it is actually set. [1]: https://github.com/odoo/odoo/commit/745ef9de97544d5c1a97e03be67e903feca40c2a Cheers to @jke-be which did the same fix in another branch in parallel. X-original-commit: 74a594bb2e68662b22477fcce24d9620b2dd0b2a Part-of: odoo/odoo#83420