YOU SAID:

I went to the store to fetch a diaper

INTO JAPANESE

おむつを取りに店に行った

BACK INTO ENGLISH

I went to the store to get my diaper.

INTO JAPANESE

おむつを取りに店に行った。

BACK INTO ENGLISH

I went to the store to get diapers.

INTO JAPANESE

おむつを取りに店に行った。

BACK INTO ENGLISH

I went to the store to get diapers.