YOU SAID:
if i could tell you you're pretty i would
INTO JAPANESE
私はあなたがきれいだと言えるなら
BACK INTO ENGLISH
If i can say you are pretty
INTO JAPANESE
あなたがかわいいと言えば
BACK INTO ENGLISH
Say you are cute
INTO JAPANESE
あなたがかわいいと言う
BACK INTO ENGLISH
Say you are cute
That didn't even make that much sense in English.