Original report: https://github.com/mattermost/mattermost-server/issues/10051
Not a regression
Steps to reproduce
1. Set System Console > Localization settings as follows (happens with any language):
Default Server Language: Japanese
Default Client Language: Japanese
Available Languages: English,Japanese
2. Go to Main Menu > Account Settings > Display.
3. Select Language: English.
When see Account Settings > Display, English is selected.
Japanese is selected.