"The languages of China are spoken by China's 56 recognized ethnic groups. The predominant language,  divided into seven major dialect groups, is known as Hanyu.... and its study is considered a distinct academic discipline in China. Hanyu, or Han language, spans eight primary dialect groups, that differ from each other morphologically and phonetically to such a degree that dialects from different regions can often be mutually unintelligible. The languages most studied and supported by the state include Chinese, Mongolian, Tibetan, Uyghur and Zhuang. China has 297 living languages according to Ethnologue." - Wikipedia

Canada has two official/working languages. I figure we won't self-destruct by having a few more.