The Steam store page for Black Cat Book Club lists ten interface languages: English, French, Italian, German, Spanish (Spain), Japanese, Simplified Chinese, Spanish (Latin America), Portuguese (Brazil), and Russian. English is the only fully voiced and subtitled language as of 2026-09-25; the other nine carry interface text only.

Black Cat Book Club interface language coverage

LanguageInterface textAudioSubtitles
EnglishYesFullFull
FrenchYesNoNo
ItalianYesNoNo
GermanYesNoNo
Spanish (Spain)YesNoNo
JapaneseYesNoNo
Simplified ChineseYesNoNo
Spanish (Latin America)YesNoNo
Portuguese (Brazil)YesNoNo
RussianYesNoNo

Audio and subtitle coverage

Full voice acting and subtitle localisation are English-only as of 2026-09-25. The nine non-English interface languages display translated menus, settings, and on-screen text, but spoken dialogue and written subtitles remain in English. Idea Garden Games has not announced expanded audio localisation for any other language at research date.