Swahili keyboard for iphone 4s
I have an iphone 4s and would like to have a Swahili keyboard on it which does not exist on the available keyboards on the 4s. I can't get gboard as it need iOS10 and the 4s won't ungrade to iOS 10.
Can anyone suggest how I could get a Swahili keyboard on the 4s?
Thank you
iPhone 4S, iOS 9.3.5