YOU SAID:
I’m only nineteen but my mind is older
INTO JAPANESE
私はまだ19歳ですが、私の心は年上です
BACK INTO ENGLISH
I'm only 19 years old, but my heart is older
INTO JAPANESE
私はまだ19歳ですが、私の心は年上です
BACK INTO ENGLISH
I'm only 19 years old, but my heart is older
That didn't even make that much sense in English.