I have some source files that have comments written in Japanese. When I open these files in Visual Studio they appear like this:
à–¾FNCAP‰¹—p‚̃XƒŒƒbƒh
I faced the same issue and have found a solution that works for me.
The problem is that the files aren't unicode and VS is trying to open them with an encoding that matches your location. Luckily, you can set Windows default behavior for non-unicode files. Check out this link, http://msdn.microsoft.com/en-us/library/ms246590.aspx. Look under "To correctly display characters that are not included in the current code page."
These directions are incorrect for Windows 8 (I can't speak for 7 or older.) For Windows 8:
Most of your programs should continue to function in English as this setting is only applied when programs and files don't support unicode.