Hello, I don't know how to add diacritic in Deadpool The Video Game?

[anonymous_user_ed2b1b3b]

I will add that the game was made on the engine: Unreal Engine 3
I would like to translate the game into Polish.
I translated almost all the dialogues, but I can’t add to the game Polish characters: ą, ć, ę, ł, ń, ó, ś, ź, ż.