Kia ora!
An internal spell check would be handy in StudioPro. Many languages have different spellings depending on what country you're based in, and it's best practice to keep to the same country's spelling for consistency across an application.
Is this a feature coming out with MAIA?
Cheers,
Kitti
I build a studio pro extension to do spell checking for document names and variables.
For spell checking UI language, I export text to an excel, with the Batch replace feature. https://docs.mendix.com/refguide/batch-replace/