08gi1qfuscte Sorry for the late reply; I've been away from the forums for a while. What I meant was, your OS is in a certain language (English, it sounds like), but you could be typing with the layout for a different language if that's the one you type with in general. This would be a software setting, helpful for people who switch languages or who want their OS in English but use a different language for everything else. But it's unlikely to have changed if you only ever type in English.
Then there's the keyboard itself, which would almost certainly be in English if you bought it in an English-speaking country. Other regions have different keyboards to include letters or symbols English doesn't have, or sometimes just because that's how things are done there (for example the AZERTY layout in France rather than the more common QWERTY layout).
The reason I asked about all this is because Sims 4 uses different hotkeys depending on the language it detects. Having the Q and A switched would be unsurprising if French is involved, due to the standard AZERTY layout, as you can imagine since the A in that case is where the Q would be on a QWERTY keyboard. So that's the most obvious explanation and also an easy fix.