Language and culture are intimately tied. You cannot just make them separated things.

You can pretend to do it. In some way it is similar to religion: you can pretend the westerner world has no religion. However, in our conduct and behavior, there is a huge christian remnant.

The same, in some way, happens with languages: the words used, the words that exist in one language and not in another, the connotations a word has... there is lots of culture embedded in a language and when you change language, culture cannot stay the same anymore. It varies bc the culture itself is embedded in languages.