Webex App uses the language setting that you selected on your device or your browser. Use one of the Webex App supported languages to make sure the app displays correctly.
Go to the language settings for your device or browser to select a language. You can check which languages Webex supports before changing your language settings.
You can also change your language settings in the web version of Webex App. Click your profile picture, choose Language, and select a new language from the drop-down list.