What kind of server-related language would be good if we are currently looking for?

There are a lot of Java in Korea.

There must be a scalar as the most popular language these days.

Until last year or so, nodes were a bit popular.

If you don't have much experience in web development, I recommend Rail.

If it's limited to web server programming,

And I'm going to tell you, because you mentioned Scala, it's a powerful. It's like a special force in the military, and it's not popular.

For your information, the Hashcode site is made of rails. So does tryhelloworld.co.kr.