Step 1 of songwriting IN BIAB is entering chords onto a chart. If you know zero theory, how you going to do that? If you know zero theory, you might enter the key of L not knowing it only goes from A to G.
Ha!....the key of "L".
I can comfortably state that I've written a song in damn near every key even though it really challenges my (lack of) vocal ability.
At least I know Q is the relative minor!
On a serious
note...learning the language to some degree is incumbent on all of us.
Back to topic....