My fault, I thought this was a common enough term. Is similar to what you linked. In macOS you can configure this kind of text substitutions like that if you type “ty” and press space, the OS substitutes what you typed by “thank you”. From System preferences > keyboard > text, you can add as much of these text substitutions as you like.
For xOrg we have software like espanso, which allows the simple substitution that macOS provides and also many other cool features that are more complex. I have failed to find a way to do this in Wayland.
I hope to have made myself clearer, and sorry for not being more explicit in my initial post!