Here’s answer -
If you don’t have ads - may be different list items for with adds…
home (house) top left
Menu top right 3 dots
2nd from bottom (settings)
look for the globe - 5th down list
first one in list is language
That should be it
this took me hours to figure after my 4 year old swiped my new kindle and used it as a phone
If they change the order play around until you find the globe - then try every item in that list until get language.