Interface language
Masto Control's interface is available in six languages: English, French (Français), German (Deutsch), Italian (Italiano), Polish (Polski), and Spanish (Español).
The language is a per-workspace setting, configured by an Admin under Profile → Settings → Interface language. It applies to every user in that workspace — there is one shared language per workspace, not a per-user override.
Changing the language updates all menu labels, buttons, form fields, and notifications across the app, including dates and currency formatting where applicable.
note
Masto Control does not support Russian. If you're looking for it in the language list, it isn't there by design — only the six languages above are maintained.