Think about it and give me your thoughts! Different cultures use different languages, even if both speak "English" they may use totally different words or phases that only their culture really uses
Every different culture has its own pronounciations, expressions and also the same word may have different meanings in several environments.
I don't know about other languages but it's can be obvious in Arabic.
Is language culture?
I would say, no. Lanuage is part of our culture.