film->set_audio_language(dcp::LanguageTag("pt-BR"));
BOOST_CHECK_EQUAL (film->isdcf_name(false), "LikeShouting_XSN-2_F-133_QBP-fr_US-R_71-HI-VI_4K_DI_20140704_PPF_SMPTE_OV");
film->set_audio_language(dcp::LanguageTag("pt-BR"));
BOOST_CHECK_EQUAL (film->isdcf_name(false), "LikeShouting_XSN-2_F-133_QBP-fr_US-R_71-HI-VI_4K_DI_20140704_PPF_SMPTE_OV");