Is There a Problem if the Demon King is a Goblin?! is a Manga/Manhwa/Manhua in english language, Demons series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

In order to destroy the world, Alex the elf resurrects the ancient demon king but he ends up being a goblin! With a demon king goblin, an elf and a pacifist orc can they really destroy the world and defeat the powerful warriors?