The international edition of 《SISTERS ~Summer's Last Day~》has been updated with Simplified Chinese and Traditional Chinese support!

As game clients and save files are not cross-compatible between language versions, existing English version owners must reinstall their desired language edition.

Adjust your language settings via:
Steam Client > Library > Sisters~Summer's Last Day~ > ⚙ Manage > Properties > General
Modify the language, then reinstall/update the game.

Why an English notice for Chinese version? Per Steam policy requirements—

so let’s all congratulate our Chinese players on finally enjoying barrier-free communication with Akiko, Haruka, and Chika!💛🩶🧡