I know there will be other languages, but in the meantime it might be easy to apply simple dictionary to the prompt field to suggest words based on most common mistakes and typos.
For non-native speakers (and sometimes for native speakers as well:)
Hi. The current version of Firefly Beta is identifying UK english by underlining it. I.E. In UK I spell "colour" and app is looking for "color". The generative fill for PS didn't make the distinction. I've noticed many other words. Certainly not an issue, but slightly annoying. Thanks.
Yes, as any of other A.I. generative models that are out there, Firefly also struggles with correct spelling of the words. Its a hit or miss at this point. The team is improving it, and your feedback is of value there. So, please feedback results.