Display language not set by Windows Language setting
1) In Windows Language Settings, make sure that both the Windows display language and the first preferred language are set to “English (United States)”
2) In Windows Region Settings, set Regional format to one that is different from the default; this has been tested both with “Chinese (Simplified, China)” and “German (Germany)”. (Apparently the “Country or region” setting doesn't matter; in any case it reproed with “Germany”.)
3) Start mu𝄐sescore.
mu𝄐sescore shows up in the language corresponding to the Regional format, which was selected in step 2 above. See attached “de-DE.png” and “zh-CN.png”.
The language of mu𝄐sescore should follow the Language settings (step 1 above), as is standard for all Windows apps. Preferably the first preferred language, but the Windows display language would also be a possible fix.
Further interesting fact:
Curiously, in the case of de-DE regional settings, they also affect the standard dialog buttons whose text normally should be taken from the Windows display language. This is not the case for zh-CN regional settings. (See attached “de-DE Save dlg.png” and “zh-CN Save dlg.png”.)
This fact is only included for context; this is not part of this Issue. In any case, it would be a much less severe issue, since it is much easier for a user to understand or guess the limited set of Windows standard texts used in mu𝄐sescore.)
Obviously, the user can prevent that error by selecting the Regional format for the language the user wants mu𝄐sescore to display in, but I hesitate to call that a workaround since it changes the behavior of all other Windows apps.