Right now AL is slightly non-consistent with it's tags.
90% of countries has two-letter (sometimes one-letter) codes. So let's take it as basis.
- French games are mostly [Fr]. But there are 5 games where French is [F].
- All Polish games marked [PL] instead [Pl] for some reason.
- All Norwegian games, except one, coded [Nor].
- Most Chinese games coded as [Ch]. But some of them coded [Tw] (even if most of "Taiwanese" games still has "Chinese CD" in description).
That's all I see now, but I'll add if I'll found something else.