- help='subtitle format [srt/sbv/vtt] (default=srt) (currently youtube only)', default='srt')
- video_format.add_option('--sub-lang', '--srt-lang',
- action='store', dest='subtitleslang', metavar='LANG',
- help='language of the subtitles to download (optional) use IETF language tags like \'en\'')
+ help='subtitle format (default=srt) ([sbv/vtt] youtube only)', default='srt')
+ subtitles.add_option('--sub-lang', '--sub-langs', '--srt-lang',
+ action='callback', dest='subtitleslangs', metavar='LANGS', type='str',
+ default=[], callback=_comma_separated_values_options_callback,
+ help='languages of the subtitles to download (optional) separated by commas, use IETF language tags like \'en,pt\'')