Hi Elana! You can turn Spell Check in the Edit menu. From here, you can designate if you would like it always on or on while your are editing your diagram. You can also change your spell check language from this menu too.

Is there an admin option to enable spell check to be on by default for all users?   

Hi @Greg C101, thank you for continuing this post! Unfortunately, there isn’t currently a way to enable spell check by default for all users on a Team/Enterprise account. Users will need to enable this individually. However, we’re very interested in your feedback and committed to continually improving our products.

If you'd like to see this option in the admin panel, we encourage sharing your idea in the Product Feedback section of this community and be sure to include details about your use case or what you’d like to see in this experience. This will also allow other users with similar requests to discover and upvote it, then add details of their own.

Finally, for more information on how Lucid manages feedback via this community, take a look at this post:

Thank you for sharing your feedback in the community. Please feel free to let us know if you have any questions.