There is a link because language contributes to the social and psychological processes involved in the formation of ethnic identity. It explores both the linguistic features of ethnic language varieties and also the ways in which language is used by different ethnic groups. I am sure you can think of different way different ethnic groups have contributed to language in your country. The prime example is rap music in America.

i think no relationship too. if u want u can speak any language after learn.language just for communicate,have fun...

i think no relation everyone has the right to learn the language s/he likes