Yes, I believe that we can change our language settings. Like all of the languages, the English language is continuously evolving since language and society are deeply intertwined (i.e., sociolinguistics). With that, this interplay allows the language's structure to adapt to that change (e.g., phonetics, morphology, syntax, semantics, and pragmatics).
I do not understand your question. Change settings in what context?
Are you asking about ResearchGate settings? Most RG content is in English. I am not aware of any ResearchGate settings that allow you to hide non-English content.