New Language of the Soul is a Manga/Manhwa/Manhua in english language, GHOSTS 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

"Demons and ghosts seem to exist only in legends. They are things that humans imagine for stimulation. It seems that the world has always been calm and peaceful, and the sky is clear. However, when he accidentally saw a ghost, his fate was rewritten. A few hours later, he was possessed by a female ghost, and then... he became a woman! "