Spell Checker
The Document > Annotation > Spell Checker command allows you to check the spelling of your project.
See Editing Commands in Text-Type Windows.
On Windows, Spell Checker uses Microsoft Word’s Spelling Check, which means that you must have Microsoft Word installed on your computer together with the dictionary of the language you are using. In Microsoft Word, use File > Options > Language to set your desired preferences.
On Mac, Spell Checker uses MacOS system preferences. Set these at System Preferences > Language & Region.