[MPlayer-users] [BUG] -slang broken for Ogg Media files

[vitko]

mplayer (may 2 weeks old CVS build) says following while
playing Ogg Media file:

    ...
    [Ogg] stream 3: subtitles (SRT-like text subtitles), -sid 0
    [Ogg] stream 4: subtitles (SRT-like text subtitles), -sid 1
    ...
    [Ogg] Language for -sid 0 is '-slang "en"'
    [Ogg] Language for -sid 1 is '-slang "cs"'
    ...

I can successfuly select audio track using '-sid 0' or '-sid 1',
but above mentioned '-slang en' or '-slang "en"' doesn't work.
Is it a bug or a feature?

Vit