YOU SAID:
Happy birthday to my dearest
INTO JAPANESE
最愛の人へお誕生日おめでとう
BACK INTO ENGLISH
Happy birthday to my darling
INTO JAPANESE
私の最愛の人にお誕生日おめでとう
BACK INTO ENGLISH
Happy birthday to my loved one
INTO JAPANESE
私の愛する人へお誕生日おめでとう
BACK INTO ENGLISH
Happy birthday to my loved one
You've done this before, haven't you.