The mentions function only works when the keyboard language is set to english. I’ve tested with the german and french keyboard configuration, and it doesn’t work.
To Reproduce
Steps to reproduce the behavior:
Go to System Preferences - Keyboard - Input Sources
Add a new input source other than english, and activate that input source
Type @ in Anytype
Expected behavior
When @ is typed in Anytype, it should trigger the mentions function, no matter what keyboard language is set.
I don’t think this is an issue with Anytype; different keyboard layouts have different symbols in place of @. for, e.g. using an Albanian layout, the number key 2 will print inverted commas. In the french layout @ is typed using the key 0.