./locale/ko/locale.cfg

[entity-name]
lighted-pole=__1__ 가로등
hidden-small-lamp=가로등 조명

[item-name]
lighted-pole=__1__ 가로등
hidden-small-lamp=가로등 조명

If you need more Korean translate files please contact me.
https://mods.factorio.com/mods/Xagros/XMKTP

Google translates __1__ 가로등 to __1__ streetlight.

Wouldn't those be more in line with the original translation?
lighted-pole=문학 __1__
hidden-small-lamp=숨겨진 작은 램프

문학 is korean means literature.
가로등 is korean means street lamp.
전신주 is korean means electric pole.

Street lamp1
Street lamp2

But lighted pole, street lamp and lamppost are called 가로등 in Korean.
small-lamp also factorio korean version translated 조명.
숨겨진 조명 are not bad, but 가로등 조명 are good in Korean.

And Korean word order and English word order are some different.
I'm Korean. so I can give you a more Korean-friendly translation.

Thanks for the explanation. I'll add Korean to the next release.

Street lamp is confusing to me since in German we use that exclusively for lamps lighting streets.