As someone who speaks English, Japanese, and computer programming languages, I will say that language absolutely affects how we think. My trains of thought are very different from someone who only speaks English or Japanese, let alone someone who doesn't speak programming; and I definitely can't fully relate to someone who speaks Spanish, Chinese, etc. either.
As far as I'm concerned, that theory is not psuedo science.
As far as I'm concerned, that theory is not psuedo science.