YOU SAID:

talk to the hand cause the face don't undertsand

INTO JAPANESE

顔が理解できないので手に話しかける

BACK INTO ENGLISH

I don't understand faces, so I talk to my hands

INTO JAPANESE

顔が分からないから手話で話す

BACK INTO ENGLISH

I don't know your face, so I speak in sign language

INTO JAPANESE

私はあなたの顔を知らないので、私は手話で話します

BACK INTO ENGLISH

I don't know your face, so I speak in sign language