I have this problem. Ever ID3 tag or whatever FLAC tag should be localized so you can select what localization you want. It's the only solution.
The only downside is dusting off the ID3 spec, amending it, and then somehow coercing everyone who thought music tagging was “done” to update their software to support it.
The software part of the solution is easy-peasy. The political part, infinitely harder.