swipe left or right on the space bar on my phone S8 to swap languages

[Android Central Question]

I have added my secondary language Arabic on my Samsung S8, however I can't seem to change it now, I use to be able just swipe left or right on the space bar on my phone S8 to swap languages in messenger. But now I cannot

 

[SpookDroid]

Have you checked that all languages are still active in the Keyboard's settings?