Khmer font, keyboard for iOS7 on iPhone

. Add Repo : 4khmeriphone/sp to your cydia
. Install iOS 7+ 5rows keyboard for iPhone.

If you see thai keyboard instead, then try this following : 
. remove the keyboard and font from cydia 
. Install iFile from Cydia
. Use iFile to delete /var/mobile/Library/Caches/com.apple.keyboards
. Reinstall Mobile Substrate
. Re-install iOS 7+ 5rows for iPhone