区别就是两者都是形容词+名词language短语，形容词不同短语意思也不同，具体的不同如下

natural languages中文意思是自然语言

For decades educators fought his idea that signed languages are natural languages like English, French, and Japanese.美国国家航空航天局技术人员在最后的检查中注意到了计算机问题。

native language中文意思是母语；[计] 本机语言；机器各单元间编码语言

All teachers are qualified to teach their native language. Additionally, we ｓｅｌｅｃｔ our teachers for their engaging personalities.