Further, I would add that English-speaking Christians are so used to using "God" as the name of the Judeo-Christian deity that we have largely forgotten that our deity has a name, variously given as Yahweh, Jehovah, the Tetragrammaton YHWH, etc. We so often use "God" as a proper name that we may forget that other religions may have similar constructs.
But overall, in America "Allah" is most often understood as the name of the Muslim deity, not just a descriptor. Consequently, I think this high school principal should be ridden out of town on a rail. Tarred and feathered, if possible.
Of course, we Orthodox Christians like to translate the Hebrew YHWH into whatever language we’re speaking, rather than leaving it in Hebrew: it becomes “I Am” or “The Existing One” in English or “ho On” in Greek (using o for omicron and O for omega).
Without the translation, one misses why the Jews really wanted to stone Jesus when He said “Before Abraham was, I am” — it wasn’t because He was claiming priority over Abraham, however offensive that might have been to Jews in the time of His earthly ministry, it was because he was saying “I’m God,” and they’d have gotten the point whether He said it in Aramaic, Greek or Hebrew.