Help testing Nextcloud 12.0.4 RC1

IMHO, there’s still a problem with the force_language setting as stated before: [1] [2]

  1. Change language in personal profile to other than default, f.e. de.
  2. Set default_language and/or force_language to en in /config/config.php.
  3. Take a look at the strings in different apps: Is it a mix of two languages, en and de?

Can someone test and confirm this please?

Is it a bug or a special setting?