I sent them an email asking if it is and they wrote back very quickly
Hi!
Thank you for your interest about our game, Dekaron.
Dekaron, currently is looking for overseas partner.
Although the English version of Dekaron was completed, but it is only opened to overseas buyers.
We don't know when it can be released exactly.
Please wait until it can be serviced.
When we start service in English, I'll contact to you.
Thank you again.