I think Nadiya and Natalie might stand a chance to win honestly. They are smart and would have figured out the system to unlocking the different languages. Honestly, Josh even said in the end it's about Mathematics and theory, to trial and error instead of pure memory challenge.
But nothing beats the idea of Abbie and Ryan winning two million dollars had they not been U-Turned
"'Cause the players gonna play, play, play, play, play
And the haters gonna hate, hate, hate, hate, hate
I'm just gonna shake, shake, shake, shake, shake
Shake it off, shake it off"-Taylor Swift <3