To this date, no Fire Emblem game has ever been localised for China, but that will soon change.
Nintendo Hong Kong has confirmed both Fire Emblem Echoes: Shadows of Valentia & Fire Emblem Warriors, are to be translated into Chinese. However, although the text for Echoes will be translated, it has been said that the original Japanese language will remain, so as to preserve the game’s authenticity.
Below you will find a video that features Hitoshi Yamagami, Fire Emblem Producer announcing his huge first for the Fire Emblem series.
Source: CHT Nintendo (YouTube)