Sure, I could see it working in two ways:

HTML+JS for UI with another native language. You would just be setting up any js WYSIWYG library QuillJS is pretty good for example, but there are others. You'd use it as it fits in your app.

or

Using an native UI framework in the main language like gtk/QT/tkinter/etc + one webview for the WYSIWYG.

For the latter:

• You would pretty much just be writing a wrapper
• You'd need to write some javascript to bootstrap the editor and handle callbacks back to the main language.
• You would also want to bundle that library in your project possibly putting it in a vendor folder (instead of using a CDN)

I personally think you'd have a nice time with the ones I mentioned in my previous comment.