language有复数吗?

language做名词的可数和不可数,有一点点复杂．
当表示在某个地区或者领域说或者写一种语言的时候,用可数
（或许用英语解释更能够体会,你看看：
the system of communication in speech and writing that is used by people of a particular country or area:能体会吗）
比如：
eg:It takes a long time to learn to speak a language well.
eg:Is English an official language in your country?
当以下情况是不可数
第一种情况：
the use by humans of a system of sounds and words to communicate
能理解吗?
比如：a study of language acquisition（语言习得的学习）
第二种情况：
a particular style of speaking or writing
能理解吗?
比如：literary / poetic languag
建议你掌握上面的就够了．
下面还有两种情况,是不可数和可数都可以．
1:way of expressing ideas and feelings using movements,symbols and sound:the language of mime
能体会吗?
eg:the language of dolphins / bees
2:a system of symbols and rules that is used to operate a computer
能体会吗?
eg:a programming language虽然有些看不懂，但还是很感谢！