transformers pytorch wav2vec2 pretraining speech xls_r xls_r_pretrained multilingual ab af sq am ar hy as az ba eu be bn bs br bg my yue ca ceb km zh cv hr cs da dv nl en eo et fo fi fr gl lg ka de el gn gu ht cnh ha haw he hi hu is id ia ga it ja jv kb kn kk rw ky ko ku lo la lv ln lt lm mk mg ms ml mt gv mi mr mn ne no nn oc or ps fa pl pt pa ro rm ru sah sa sco sr sn sd si sk sl so hsb es su sw sv tl tg ta tt te th bo tp tr tk uk ur uz vi vot war cy yi yo zu dataset:common_voice dataset:multilingual_librispeech arxiv:2111.09296 license:apache-2.0 endpoints_compatible region:us