Adding a Fallback Language

If your manifest doesn't include language data, you can specify the fallback language of the content with the following parameter:

Attribute	Type	Required	Description
language	string	no	Language of the content in ISO 639-1 format

This attribute will make sure the assets that doesn't have a language information are registered with the registered language parameter.

m.player.callFunc("setConfig", {
    ...
    content: {
        media: [
            ...
        ],
        language: "en"
    }
    ...
})