STT44 wrote:Having given up on Japanese more times than I care to remember, my conclusion is that category 5 languages don't sit well with polyglottery. You cannot mess about with 5 other languages if you want to learn Chinese or Japanese. I have no experience with Arabic or Korean, so cannot comment.
Agreed 100%. I have seen a decent number of people with C2 in five languages...except they are almost invariably all Germanic or Romance languages. The ones I have seen who were super advanced in Chinese tended to be super advanced in Chinese...and nothing else. And even being "super advanced" in Chinese in the first place at all is pretty rare.
Not saying it can't be done (it obviously can), but if "polyglottery" is your goal, AND you want to learn these category 5 languages, you had better be prepared for this to be an undertaking spanning literally several decades (even when focused on just one at a time).