Of course they speak Chinese! Chinese is not a language, it's a family of languages. Of this family, Mandarin is the one spoken by the most people (around 750million) Comm … ent: I'm living in mainland China. They're a lot of languages in China,but now the government implements only Mandarin as official language.onfidence votes 7. Chinese is not just one language; it is really a family of many dialects, some of which are so different from one another that they could possibly be considered different languages.