Read on below for official patch notes for update version 1.5.0: You can now select Chinese (Traditional), Chinese (Simplified), or Korean in the language settings menu on the Switch console to display text in... (video-games-galore.com)
It simply aims to fix bugs which haven't yet been addressed in official patches, such as quest impediments. (mic.com)
Nintendos official patch notes have been published, and can be seen below. (mypotatogames.com)