> What would be a better way to incorporate AI as a spell checker?

Don't do a stupid thing like that in the first place.

> In comparison to non-AI traditional tools, AI has the advantage of "understanding" the text, reducing the number of "stupid" mis-corrections.

I doubt it, but if that's true, run a normal spell checker, and then give the output to your LLM to filter.

> what is there to gain by interfacing it with traditional solutions,

About a billionfold improvement in compute efficiency, and a lower error rate.

> and how can it be achieved?

10 seconds of actual thought.