Spellcheck doesn't work

My spellchecker don’t work any more, I recently moved to Linux and using an AppImage not. Does anyone know it could be related or not. I am not sure when this happened. Also in Settings > Editor , I click on gear Icon beside Spellcheck it say dictionary. Please someone help.

Did you download the AppImage from the Obsidian website?

Moreover, check the spellchecker functionality in the sandbox vault. If it works there, then you have a plugin, CSS snippet, or some other customization interfering.

Yes the image is from obsidian.md
And I just tested it .Even in sandbox vault it still doesn’t work.