If no suggestions for stickers or emoji appear when you enter text, try the steps below.
1. From the Home tab, tap Settings > Chats > Display suggestions > Languages.
2. At the top right of the screen, tap Edit > "-" next to the languages you're using > Delete.
3. Re-download the languages.
You won't be able to delete the language that is currently set on your device. Try deleting and re-downloading the language after setting a different language on your device. For information on how to change the language on your device, see this Apple Support page.
If the issue persists after you've tried the steps above, try: