As a bilingual/trilingual user (I have English, Portuguese, Italian, Spanish, French and Chinese keyboards enabled, and use the first three on a daily basis), I have had surprisingly few issues with either swiping or pecking at the keyboard, perhaps because I automatically switch to pecking the instant I spot swiping going down the “wrong” decision tree.
But I also think having this many keyboards enabled makes iOS basically throw up its tiny virtual hands in frustration and nullifies most fancy predictions.
(This was mostly swiped in on an iPhone 15 Pro running iOS 26 with very minor hiccups)