“Allah” is apparently the equivalent of “God” (both spelled out since this is discussing the halacha), and should be treated with equal respect. This applies to both its written and spoken usage.
I had the opportunity over Shabbos to discuss this with a Rov who is a talmid chochom and who I’ve asked shailos to in the past.
I realize that not mentioning the Rov’s name means that this is basically an unattributed statement, but: a) I didn’t ask his permission to repeat what he said publicly in his name b) It’s too close to home and would include personally identifiable info.