If you believe that “all languages have words for yes and no” or some poppycock like that, then this will shatter your naïveté. https://www.lexiconista.com/falsehoods-about-languages/
@amdg2 @lexiconista One challenge in many English speaking countries is that there is almost no background presence of other languages. Go to Germany and you'll see chunks of escaped English everywhere. Go to the UK and you won't see any random German adverts amidst the English, or very much dubbed/subtitled stuff to learn from by immersion.
It's a shame because everyone should experience Star Trek TNG dubbed in German just for the hilarity.