A spell-checker for InqScribe is a common request. We intend to support spell-checking (as well as styled text) in a future version. For now, the easiest way to handle spell checking is to cut and paste into Word when you’re done and run a spell check.

Feel free to cast your feature vote here: https://support.inqscribe.com/forums/4206-general-feedback-for-inqscribe/suggestions/33717-add-a-spell-checker

UPDATE: Our InqScribe 2.5 Beta now includes a spell check! Learn more about the 2.5 Beta here:
https://blogs.inquirium.net/inqscribe/2019/10/inqscribe-2-5-beta-now-available-for-macos/