It's not A Man of His Word. In this one humans are told possible word combinations by a computer and they speak them. The more words the more powerful the spells, but not all word combinations are possible. I think the words are in Jewish and the main character learns one with 7 words long or something. It's either set in modern times or slightly futuristic.
I think they mention the name of a god or GOD to be 36 words long or something.
Edit: In this story its like companies all over the world competing to find the spell words combinations. It starts in some office building with the narrator and main character going over the rules of magic.
I think it may a web story.