"Kreyol se Bondye lang!" Kreyol is the language of God! Is this a good translation? Are there any better ways to say this? Mesi anpil

Of course.
Say instead:
Kreyòl se lang Bondye (Creole is God's language)
Kreyòl se lang Bondye a (Creole is the language of God)
Kreyòl la se lang pa Bondye (The Creole language is God's own language) 

Haitian Creole ↔ English Reference, Look up Haitian Creole and English Words