People do, of course, create new vocabulary, but that's not modifying language on a deep level. And, in part that's a convenience: even when you don't have a "word" for something, you can generally describe it. But if it's something you're going to refer to frequently having a nice lexical entry for it is more convenient. We have memory limitations, so sometimes having convenient handles can free up resources.
And your example, I think, also speaks to the point: you're able to reason in mathematical ways; being a speaker of English doesn't block this, even though English perhaps doesn't offer convenient vocabulary for this in all cases.
And your example, I think, also speaks to the point: you're able to reason in mathematical ways; being a speaker of English doesn't block this, even though English perhaps doesn't offer convenient vocabulary for this in all cases.