I’m gonna second French and Arabic for sheer amount of speakers (native or as secondary language), as well as geographic variety.
Other than that, I would’ve said that Russian would serve you well in the post-soviet sphere of influence, but that changed recently for obvious reasons. You very likely don’t want to travel to Russia, and her neighbors don’t look to kindly on Russian either, now. Will still do in a pinch
okay, and one joke answer: Japanese, you’ll find weebs to talk to in every country
It’s also a legitimate question: what constitutes politics in the eyes of the moderators? That question cannot be answered without bringing one’s own politics into the discussion. Is queer people existing political? Bigots would claim so. Besides, war is just politics though violent means, and satire should also always be political. So being strict on the “no politics” rule is next to impossible, and selective enforcement is often worse than none at all.