YOU SAID:
I can't believe you've done this.
INTO JAPANESE
私はこれをやったなんて信じられない。
BACK INTO ENGLISH
Can't believe I did it.
INTO JAPANESE
それをしたなんて信じられない。
BACK INTO ENGLISH
Can't believe it.
INTO JAPANESE
それを信じることができません。
BACK INTO ENGLISH
I can not believe it.
INTO JAPANESE
信じられない。
BACK INTO ENGLISH
17583:wait
INTO JAPANESE
信じられない
BACK INTO ENGLISH
17583:wait
Okay, I get it, you like Translation Party.