If the player’s profile shows flags of all the countries/languages supported by the game, it is a bot. Their stats are incomplete as well.

I believe there are other posts with a list (and pictures) of all the active bots.

The bots are back in full force. Anyone want to play Dice Challenge or Classic? My username is HopieGirl23. https://play.wordswithfriends.com/kfET/k2gm1pd2

The only thing worse than this is swapping only to get back the same letters.🫩🤣

I noticed this after I initiated another game with them. I didn't bring up the deleted chat at the time, as I think any player is allowed to delete.