#637 ISO632-2 language codes not recognized

[Alessio Gaeta]

Hello,
the audio track menu shows "unknown" for MKV audio tracks language, despite the language being correctly set in metadata. I guess it depends from using ISO632-2 three-letters code, instead of ISO632-1 two-letters.

Please note that ISO632-2 is the standard for MKV files.

I guess this happens also for subtitles (although I did not verified it).

Thanks for you work

--
Alessio Gaeta