Hmm, approximately...Zero, Null, Nul, Cero, Zéro, Nolla, Nolla, Nolla, Null, Nul, Nulo, Nol, Null, Nulis, Nolla, Null, Nula, Nulla, Null, Sıfır, Zero, Nula, Zero, Nol, Zero, Ziro, Ноль, صفر, صفر, शून्य, শূন্য, शून्य, సున్నా, ಶೂನ್ಯ, ശൂന്യം, ਨਿਜੀ, ศูนย์, សូន្យ, 零, ゼロ, 영
Now a far better question, who actually read all those advices, well, it starts with Z, ends with o, and spells like zero!

That's why all these topics are useless, nobody is going here even to actually discuss things, just to raise their quotas in a topic where ever bulsshit is tolerated as having an opinion, if it were by me I would trash every single one of those or send them to the off-topic board.