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 the following Apple Support page.