Hi @LeFrench, let me see if I can help out here!
First of all I suggest that you check whether the function "Touch Vibration" is turned on or not. In order to check this, find and tap Settings > Tap Sound > Tap Advanced. If the slider next to the text "Touch vibration is gray, tap the slider in order to activate the function.
Secondly I advice that you make sure that Swiftkey is using the Android default vibration. Find and tap Settings > Tap System > Tap Languages and input > Tap On-screen keyboard > Tap Swiftkey keyboard > Tap the pink icon named Typing > > Tap Sound & vibration. In here, make sure that the slider next to the text "Use the Android default vibration" is turned on.
Try this and let me know if it helps! 
