YOU SAID:

Be the reason someone smiles

INTO JAPANESE

誰かの笑顔の理由になる

BACK INTO ENGLISH

be the reason for someone's smile

INTO JAPANESE

（人）の笑顔の理由になる

BACK INTO ENGLISH

be a reason for someone's smile

INTO JAPANESE

（人）の笑顔の理由になる

BACK INTO ENGLISH

be a reason for someone's smile