How can we support multi language?
You can provide support for different locales by using the resources directory in your Android project. You can specify resources tailored to the culture of the people who use your app. You can provide any resource type that is appropriate for the language and culture of your users.
Why is my Facebook Marketplace Assistant in a different language?
Go to Admin pane l> Genera l> Essentials, and scroll down to the "Marketplace languages" section. The first language in the list is the default language of your marketplace. You can add additional languages by clicking in the field and searching for the language.