YOU SAID:

My credit card isn't working, man.

INTO JAPANESE

クレジットカードが使えないんです、おい。

BACK INTO ENGLISH

I can't use credit cards, dude.

INTO JAPANESE

クレジットカードは使えないんだよ、おい。

BACK INTO ENGLISH

You can't use credit cards, dude.

INTO JAPANESE

クレジットカードは使えませんよ、おい。

BACK INTO ENGLISH

You can't use credit cards, dude.