All of Stata's interface—all menus and all dialogs—is now available in Swedish.
If your computer locale is set to Sweden, Stata will automatically use its Swedish setting. To change languages manually using Windows or Unix, select Edit > Preferences > User-interface language... using Mac, select Stata 15 > Preferences > User-interface language... You can also change the language using the set locale_ui command.
StataCorp gratefully acknowledges the efforts of Metrika Consulting AB, Stata's official distributor in Sweden, Finland, Norway, and Denmark, for the translation to Swedish.
Learn more about the set locale_ui command at [P] set locale_ui.