The PC version of this game is offered for sale exclusively on GOG while the Nintendo Switch version, according to the dev studio, "eastasiasoft", is offered on PlayAsia.
This is the GOG version of the game.
According to the GOG page for this game and the game's official page on "eastasiasoft", there is English support via the English interface and English subtitles (Support for Traditional Chinese subtitles is also included - Note the first Kanji character within the brackets, "繁", which denotes "Traditional" in "中文(繁體)" vs "簡" in "中文(簡體)" or "Standard Chinese").
This is the GOG version of the game.
According to the GOG page for this game and the game's official page on "eastasiasoft", there is English support via the English interface and English subtitles (Support for Traditional Chinese subtitles is also included - Note the first Kanji character within the brackets, "繁", which denotes "Traditional" in "中文(繁體)" vs "簡" in "中文(簡體)" or "Standard Chinese").