What are the implications of me signing this? Im english she is polish?
WTF? You married a woman not a Pole.
Implication of what? Pre-nub is a legally binding agreement between husband and wife to be. What you'll put in there is up to you both.
You can agree that you'll pay her debts. You could agree that she is the one responsible for her debts.
You could agree that in the event of a divorce you'll pay her an able sum of monies or that she'll pay YOU an ample sum of money.
How the hell WE could possibly know???
Are you sure you're ready for a marriage?
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I believe that she wants you to become responsible for paying her debts.
Your view of your own sex is uplifting. lol!