Different perspectives on how language shapes identity?

I am developing my Theory of Knowledge question, for my IB class. My question is “What is the role of language in the development of identity?” I need at least two different perspectives, but I am struggling to come up with perspectives that are different. Any ideas or opinions?
http://www.theatlantic.com/education/archive/2015/11/the-costs-of-english-only-education/413494/ The link is my real life situation that I am basing it on, but if there are ones that better prove points, then I can switch.