Check the spelling in a spreadsheet in Numbers for iCloud
You can turn on the spell checker so that misspelled words are displayed with a red dotted underline, and suggested corrections are shown.
Note: The spell checker is only available for some languages. If misspelled words aren’t underlined or if the suggestions seem wrong, a spell checker might not be available for the language you’re using.
Click the More button
in the toolbar, then choose Preferences.Make sure the “Check spelling while typing” checkbox is selected.
As you type in your spreadsheet, click any underlined (misspelled) word, then do one of the following:
Click the suggested spelling you want to use.
Type a new word over the misspelled word.
To turn off the spell checker, click the More button button in the toolbar, choose Preferences, then deselect the “Check spelling while typing” checkbox.
Note: To add or remove words from the dictionary or spell-check in multiple languages, open the spreadsheet in Numbers for Mac, Numbers for iPhone, or Numbers for iPad.