The main difference that Japanese rules make on scoring is, essentially, codifying a matter of etiquette directly into the scoring: they aggressively penalize extending the game with unnecessary moves, which to be sure has some distortionary effects, but again, they don't essentially change what people considered the meat of the game; you'd play 90% the same game regardless of counting method, with differences cropping up basically once a player starts passing. This has far more ... pedagogical value outside the game, than the impact it has on the game itself.
By far the most important rules in a ruleset, in terms of how they affect core gameplay, are the repetition rules, and even the choice of suicide rule has a more substantial impact than the differences between scoring systems.
About localization, I started playing in a go club and the people I played with told me the Japanese names and their meaning. I already knew all the words when I started reading books. I understand that if you started reading books and watching videos from day one, that's a problem.
And about learning Go, the very first months are a very dense fog. Somebody never emerge from the fog.