I think you are the one who need re-thinking.
There are tons way of calling Phantoms,
But you specifically picked the worst way of calling it.
F-4FG, when Spey phantoms are neither F-4F or F-4G.
I explained why it is ridiculous nickname.
Calling Phantom FG.1/R.2 as F-4FGs are almost same like
calling
Harrier GR.1/3 as AV-8GRs
Harrier GR.7/9 as AV-8BGRs.
Harrier T.11 as TAV-8BT
AH Mk.1 as AH-64AH
and such.
You are unintentionally or intentionally strawmanning here again.
I am telling that you shouldn’t use your specific term ‘F-4FG’ because Spey Phantoms are not F-4F or F-4G, those Are F-4K and F-4M.
If you want to call them just ‘FG’? It might be confusing a bit, but who cares; there are no other british planes with [Whatsoever FG.X] designation in this game…
Oh, if you call those ‘FGR’, then it might be confusing with Eurofighter FGR.4
What I am calling ‘cursed mixture’ is
F-4 + FG.
You can call those Phantom FG or just FG if you really want to.
Don’t use that specific cursed way of shortening the terms.
If you want to use “F-4”, then call those F-4K/M,
If you really want to use “FG”, then Phantom FGs, FG, and such
Just don’t do “F-4FG”.
And honestly, it seems calling those Spey Phantom wouldn’t need extra handiwork compared to typing F-4FG to me.