If you're kicked and it's not for being AFK, offline, harassing someone or cheating then it's technically vote kick abuse.
The question is, will square-enix do anything about it?
No. You'll complain to them, and after a number of automated responses they'll tell you that they can't interfere with internal party politics. Essentially vote kick abuse doesn't exist in their eyes as you need a majority party vote to kick someone, and if the majority wants something, it's somehow intrinsically fair in their eyes.
If members of your party ask you to pull mobs for xp, in a dungeon designed for people to level in, and you refuse, aren't you the one harassing them? You've entered a dungeon and are now limiting their exp gain because you're too lazy to handle a couple of extra minutes of doing your damn job! Tanks are in such short supply at the moment they can get away with not helping their party members out because they know that people are hesitant to kick them due to long wait times for a replacement. If a dps turned around and refused to dps a mob, or a healer refused to heal a pull because they didn't need the xp, they'd be kicked on the spot probably by the dead tank.
Also if DPS pulling mobs is harassment, does that give tanks the right to kick them if they pull by accident? How many mobs is considered harassment? Is it harassment if I pull threat off a tank too? How does this apply to bad tanks?
As for the language barrier, the answer is simple, queue in a language you understand. This is one of my main issues with this game, and it happens primarily with French players. Nobody wants to play with them because they've got a rep for being rude and abrasive, as a result they queue in English because nobody queues in French, despite not being able to speak English. The breakdown in communication is their problem, not mine. If I ask that French tank to pull something and he doesn't understand me despite him being queued in English, that's his problem and it certainly does not give him the right to kick me.