The language can not be selected or changed in the Carly app directly. It is the same as the language selected in the system settings of your cell phone. If you, for example, selected English as a system language, Carly would be shown in English as well.
Currently, we support English, German, French and Spanish as the app languages. If you select any other language in the system settings and Carly can’t recognise it, the app is automatically displayed in English.