The new Google Sheets has an improved spell check functionality! Spelling is now checked against the web so that the dictionary is always up to date. Misspelled words can be seen in a window on the upper right corner of the screen along with suggested spellings. Users can access the Google Sheets spell check functionality through the Tools tab.
We expect to see this update in the UMICH domain in the coming weeks. For more information, see Spell Check in the New Google Sheets.