language_code    3820 libavformat/movenc.c         avio_wb16(pb, language_code("eng")); /* language */
language_code    3921 libavformat/movenc.c     avio_wb16(pb, language_code(lang)); /* language */
language_code    3948 libavformat/movenc.c         avio_wb16(pb, language_code("und")); /* language */