LP language for geos that use multiple languages?

Hello

I'm quite new to this whole thing and just started working with survey offers. While the offer I have is auto translated based on browser language, my LP is only in English. For instance if I want to run the offer with SA traffic, should I then only buy traffic with browser lang=EN, or should I have my LP auto translate based on browser language as well? Or is it passable to just use an English LP on