Samsung
Turn Emoji Suggestions On or Off auf Samsung
Emoji suggestions are part of Samsung Keyboard, not a separate app. As you type, the keyboard compares your words against a list of known terms and phrases that have a matching emoji.
When it finds a match, it shows the emoji above the suggestion bar so you can tap it instead of finishing the word. This runs alongside normal word suggestions and, on supported models, sticker suggestions, but each of these three features has its own switch.
Turning off emoji suggestions does not affect autocorrect or word prediction. You keep getting text suggestions as usual, just without the emoji popping in.
Where to change it
The setting lives in the keyboard configuration, not in the general Language and input menu. Go to Settings ➔ General management ➔ Samsung Keyboard settings and enable or disable Suggest emojis there.
If emoji still show up after disabling this option, check whether you switched a third-party keyboard on by mistake, since each installed keyboard app manages its own suggestion settings separately.