>>9868537 <<lb>>
Again, because you are slow.
The religious Jews intentionally depicted the name of God as YHWH in an unpronounced manner, because they did not want to pronounce it incorrectly. So, better safe than sorry. Say HaShem, rather than risk death.
Because they believed that pronouncing the name of God incorrectly was blasphemy.
And blasphemy that was punishable by death.
Your "there are many languages" argument is kind of absurd in a unique case of the one true God and his Chosen People interacting with each other.