YOU SAID:

This is very cool! I can't believe you did this

INTO JAPANESE

これはとてもクールです！あなたがこれをしたなんて信じられない

BACK INTO ENGLISH

This is so cool! I can't believe you did this

INTO JAPANESE

これはとてもクールです！あなたがこれをしたなんて信じられない

BACK INTO ENGLISH

This is so cool! I can't believe you did this