Bwamu Cwi, or just Cwi, is a gur language spoken in western Burkina Faso. It is incredibly difficult to find information about this language online; the Wikipedia article about it is only a few sentences long, and the only video available seems to be a translation of the Bible in English, with subtitles that are perhaps written in Bwamu.
Tones: Bwamu Cwi is a tonal language
Sounds: It has nasal vowels that do not exist in English. These are produced by allowing air to escape through the nose while pronouncing the vowel.
Clicks: The language uses click sounds, although these are more prevalent in some other Bantu languages.
Language of Respect: Politeness and respect are often conveyed through specific forms of address and use of honorifics. For instance, using "mwaiseni" (welcome) shows respect and formality
Hello: Shani
Welcome: Mwaiseni
How are you?: Muli shani?
Yes: Ee
No: Awe
Help me: Ndekeleni
Do you understand?: Mwashibukisha?