If you would like to change the language of the Calm app navigation and menu options, you can do so by updating your device's language settings. Currently Calm is only available in English and German, so the Calm app menu options will always be displayed in English unless your phone or tablet language is set to German.
iPhone, iPad or iPod:
You can change your device's default language via Settings > General > Language & Regions. Please see this article for more details and screenshots.
Android phone or tablet:
You can change your device's default language via Settings > System > Languages & input > Languages. Please see this article for more details.
If you would like to change the language of the Calm website, you can do so by updating the language settings for your browser. You can read about how to switch your browser language to English, German, or another language here.