Summary
The ChatGPT macOS app does not provide an option to switch the UI language to Simplified Chinese. This appears to be a regression or region-dependent issue introduced in recent versions.
Environment
- macOS: 26.4.1
- ChatGPT app: 1.2026.098 (1776453807)
- System language: Simplified Chinese
- System region: Hong Kong SAR
- App Store region: United States
- Current IP location: United States
Reproduction Steps
- Launch ChatGPT macOS app
- Navigate to Settings → General → Language
- Attempt to change UI language
Expected Result
Simplified Chinese should be available as a selectable UI language.
Actual Result
- Simplified Chinese option is not present
or - Language setting does not affect UI language
Observations
- The web version of ChatGPT supports Chinese normally under the same account
- Multiple users are reporting the same issue after recent updates (community reports)
- Issue persists after restart and re-login
Hypothesis
The app may be prioritizing region (App Store / system region / IP) over system language when determining available UI languages, leading to Simplified Chinese being hidden in certain region combinations.
Impact
This significantly affects usability for Chinese-speaking users, especially those using macOS desktop as their primary client.