The Shopee mobile app can be set to Chinese language in the language settings.

Here are some steps for your reference:

1. Open the Shopee app and click the "Settings" button in the upper right corner of the page.

2. On the settings page, select the "Language and Region" option.

3. On the language and region page, click the "Add Language" button.

4. In the pop-up language list, select "Chinese (Simplified)" or "Chinese (Traditional)" as the language to be set.

5. Click the "OK" button to save the settings.

In this way, the Chinese language will be displayed in the interface and function menu of the Shopee app. Please note that if the language has not been set before, the Shopee app may not automatically display the Chinese language. If necessary, you need to re-enable the Chinese language in the app's settings.