YOU SAID:
who ca'nt roll their tongue
INTO JAPANESE
舌を転がさない
BACK INTO ENGLISH
I won't roll my tongue.
INTO JAPANESE
私は舌を転がしません。
BACK INTO ENGLISH
I don't roll my tongue.
INTO JAPANESE
私は舌を巻かない。
BACK INTO ENGLISH
I don't roll my tongue.
That didn't even make that much sense in English.