How to change the learning language and/or the app interface language?

You can adjust both the language you are learning and the app display language. See how:

• Change the learning language: The available languages are defined by your company, so you will only have access to the languages enabled by your manager. If you have more than one language available and want to switch between them, go to the Home screen, click on the flags icon in the top right corner, and select the desired language from the dropdown menu.
• Change the app display language: Go to Settings → Language and choose your preferred language from the available options: German, English, Spanish, French, Italian, and Portuguese.