If you see something I took from another post, please let me know because it happened without my knowledge.
Remember, God of the gaps argument is made by the atheists. I’m arguing against atheism.
Think of it this way: atheistic arguments have attempted to establish that science somehow replaces God. This shows an inexplicable failure to understand the definition of God. God has always been understood as creator of everything, so that anything discovered by scientists is merely one more piece of the creation puzzle.
Atheism falls flat when challenged to explain how to reduce language according to their ideology of scientism. To understand the problem takes a bit more focus than some atheists might be used to. But get on with it, stop being lazy.
While it was originally a theist term, it's now a euphemism for what theists do when they claim a lack of scientific knowledge proves God.
A perfect example is your comment about language, and saying that since science and linguistics can't explain everything about language, than that lack of knowledge proves God.
Theists do the same things in cosmology, biology, physics, and just about everywhere else. Where there's a lack of scientific knowledge (a gap), they insert God. Hence, To them God exists in the gaps in knowledge.
The problem for theists in using this argument is that science closes gaps all the time. Also, a gap in knowledge does not prove the supernatural, only that science has not yet come up with a satisfactory, natural explanation.