Complex sentence: Azerbaijani is a member of the Oghuz/Western branch of the Turkic languages and is closely related to Turkish, Qashqai, Turkmen and Crimean Tatar with which it is, to varying degrees, mutually intelligible.
Split into simpler sentences: Azerbaijani is a member of the Oghuz branch of the Turkic languages. It is mutually intelligible and closely related to Turkish, Qashqai, Turkmen and Crimean Tatar with which it is, to varying degrees, mutually intelligible.