Is there a detail article about QuickType and how it records words?

[venividivigor]

if somebody can link me to a page where it goes into detail on QuickType and the ability for iOS to remember typed words.

Sometimes usernames show up in QuickType and I wanna know if it's recorded and logged there forever or if it's temporary and gets deleted over time. I want to know for security reasons.

And when you type a word repeatedly, the word will show up on the QuickType suggestions. And I wanna know the details on how these all work

 

[DeltaMac]

You can always remove the words that you have added to QuickType:
Settings/General/Reset - then Reset Keyboard Dictionary
That removes ALL the words and names that you have typed in the past, or made changes to the spelling.

 

[Armen]

Apple's native keyboard kind of stinks for removing dictionary entries compared to Swiftkey. In Swiftkey you just tap and old the suggested word and it removes it right from there.