Hegemony
In the 19th century, hegemony came to denote the "Social or cultural predominance or ascendancy; predominance by one group within a society or milieu". Later, it could be used to mean "a group or regime which exerts undue influence within a society". Also, it could be used for the geopolitical and the cultural predominance of one country over others, from which was derived "hegemonism", as in the idea that the Great Powers meant to establish European hegemony over Asia and Africa.
Mock language
When using mock language, the speaker is showing their 'cosmopolitanism' or global knowledge. One dominant language ideology is that English should be the only language spoken in the United States, establishing English as a hegemonic language. This hegemony creates a dominance of the hegemonic group over the ones that have not conformed. Mock language reinforces this, as it takes language and culture out of context to show the speaker's worldly knowledge, but does not celebrate or intellectually use the language. This ideology is actually maintaining the subordinate status of the other languages used as the language speakers in that community are expected to speak English and not in a mocking way.