Bug: the language of the account confirmation page is different (French) from the browser and event language (Dutch) when creating an account with Google

Details of the bug:

1. A Caroster Plus event is created and the language set up for the event is Dutch
2. A user click on the link oh this event
3. The user create an account with Google and his browser is in Dutch
4. He is redirected to the account confirmation page (choose to allow data processing and apply for the newsletter page) in French

Expected behavior:

1. A Caroster Plus event is created and the language set up for the event is Dutch
2. A user click on the link oh this event
3. The user create an account with Google and his browser is in Dutch
4. He is redirected to the account confirmation page (choose to allow data processing and apply for the newsletter page) in Dutch