Galaxy 3, T-Mobile, bought used online.
My phone's been adding "Mbeki" to my emails.
None of the ideas I found helped. So I decided to explore.
Just now, I composed an email to myself, typed "M", and "Mbeki" appeared.
THIS time, I used the dropdown arrow to check the list of suggested/remembered words.
Mbeki was there, of course. On a hunch, I held my stylus on Mbeki (within that list of words), and a new window opened up asking, "Remove from Learned Words?"
Yes, please.
No more Mbeki