The app will automatically detect your device's language settings and use that language as a default to localise the interface and search for courses. If Memrise has not yet been translated into your native language, the app will appear in English.
In order to use Memrise in another language, and look for specific language pairs (when available), you will need to change your device's language settings.
If you wish to learn a course from a different source language, click on the language and then tap Browse more courses.
Then select your new source language from the "I speak" list. If the course is not currently translated for this language, the course for English speakers will be shown.
Please note: by default, the app will not show you courses in the language of your device; for instance, if your device's language is set to English, English courses will not appear in the list of languages.