YOU SAID:
i'm allergic to the sun
INTO JAPANESE
太陽にアレルギーがあります。
BACK INTO ENGLISH
Have an allergy to the Sun.
INTO JAPANESE
太陽アレルギーがあります。
BACK INTO ENGLISH
I have sun allergy.
INTO JAPANESE
私には太陽アレルギーがあります。
BACK INTO ENGLISH
I have sun allergy.
That didn't even make that much sense in English.