Bug fixes
Missing theme scene-name locales fall back to English (not Chinese)
Theme Shop card names refresh when the language changes
Also new
Theme scene names fully localized for all 11 languages
How to get this update (Playtest)
If you have not received the update yet:

Steam Library → right-click Thousand Floors → Properties → Betas
Check Enter beta access code, enter: qiancengdengta (lowercase, no spaces)
Under Select beta, choose playtest (not Default)
Close Properties and wait for Steam to finish downloading
Launch the game — v1.2.1 appears at the bottom of Settings
Troubleshooting

Only Default in the list: the new version is not live yet — try again later
Wrong version number: confirm playtest is selected; Verify integrity of game files, then restart Steam
When this version ships on the main branch, switch back to Default in Betas — no access code needed.