Are Chinese English Japanese American French countable nouns? Do they have plural forms?

Are Chinese English Japanese American French countable nouns? Do they have plural forms?

You need to know that countable or uncountable in English is a grammatical concept, not whether it can be counted in understanding. Chinese and Japanese are words in the same singular and plural, that is, a Chinese is a Chinese, and two or more are English Chinese.American There is a change in the singular and plural