Under Windows I use following keys to switch among 3 languages: ctrl+8, ctrl+9, ctrl+0. No Autohotkey is required for that, Windows has built-in feature to redefine these keys combinationations (with some limitation).
So you must use both hands for that, and stretch your right hand to reach the numeric row, and also blocking some app combos? How is that better than getting Autohotkey?
The reason for not using the good idea of a single key per language isn't explained, and Caps lock is fundamentally less convenient (it's a sideway pinky key, rather unergonomic compared to a thumb Ctrl modifier)
I’m not sure I understand you here. My thinking is that every key on a keyboard is in use, ruling out picking even one key, much less three, and same goes for chords. Capslock is a very low value key so hijacking it seems least bad?
No, keys can have multiple uses, so nothing is ruled out. For example, you can have a short or double tap of the left Control to do something without the negative effect of affecting your Ctrl+X combos. So no hijacking, but a peaceful coexistence
Caps is low in value, but also low in convenience