Spell check - how working?

<img width="855" height="820" alt="Image" src="https://github.com/user-attachments/assets/5905bbe2-42fa-4dbd-a71c-1c931ef03205" />
but nothing happened, wrong words not selected:

<img width="782" height="351" alt="Image" src="https://github.com/user-attachments/assets/fc0d7b27-6ae7-4cb5-902a-8266d867e242" />