区别是：
relevant意思是有关的，中肯的；相关联的；确切的；有重大意义。
relatable意思是可信的，听上去很像。
例句：
relevant
1、We are trying to make politics more relevant to younger people.
我们试图使政治活动更加贴近年轻人。
2、Make sure you enclose all the relevant certificates.
要保证把所有相关证书都放在里面。
3、We have passed all relevant information on to the police.
我们已经把所有相关信息都告知了警方。
4、He decided to prosecute her after careful consideration of all the relevant fact.
在认真考虑了所有相关事实后，他决定起诉她。
relatable
1、A little vulnerability makes you human and oh so much more relatable.
一些无知反而能让你更加人性化，更易接近哦。
2、Max is a very relatable child who wants to dominate his environment, especially hismother.
马克思是一个非常可靠的孩子，他想要支配他的环境，尤其是他的妈妈。
3、Another key to being honest and relatable is keeping a conversational style.
另一个保持城市和可信的秘诀在于始终使用对话风格。
4、It's not just killing and fighting but manages to touch people's hearts and movespeople through relatable characters.
它不只是打打杀杀，而是设法去打动大家的心，通过让人觉得和自己有关的角色来感动大家。
