There's descriptive and there's prescriptive linguistics. The first is the scientific endeavor of finding out and explaining how a language works. The second is the realm of anal politicians from the colonialist era who used language as an oppression tool to suppress local cultures and force the hegemonic culture upon indigenous people to make it easier to dominate, eradicate and subjugate them. Currently regarded as one of the defining elements of Genocides. For examples see, Spanish, French, English, Russian, German, Dutch, Portuguese, Mandarin … well you get the idea.