The Amdo language (Tibetan: ཨ་མདོ་སྐད་, Wylie: A-mdo skad, Lhasa dialectIPA: [ámtokɛ́ʔ]; also called Am kä) is the spoken language of the majority of the people of Amdo in northeastern ethno-cultural Tibet, in Chinese provinces of Qinghai and some parts of Sichuan (Aba) and Gansu (Gannan). It is one of the four main spoken languages of Tibetan, the other three being Standard Tibetan (ü ke) Kham (kham ke) and Ladakhi (tö ke). All four main languages of Tibetan share a common written script but their spoken pronunciations, vocabularies and grammars are different. These differences may have emerged due to geographical isolation of the regions of Tibet. Unlike Khams language and standard Tibetan, Amdo language is not tonal. It retains many word-initial consonant clusters which have been lost in Central Tibetan.