Why does System Link not work with Brute Force?

Brute Force does not support System Link games when the players' Xbox consoles are located in different regions. For example, you cannot join a European Xbox to a System Link game hosted by a North American Xbox.

Brute Force does not support System Link games on Xbox consoles within the same region when the consoles are configured to different default languages. For example, you cannot join one North American Xbox to another North American Xbox if the default language of one is configured to "English" and the default language of the other is configured to "Spanish." For these two Xbox consoles to join successfully, both must be configured to the same default language (English and English, Spanish and Spanish, and so on).

When you search for a System Link game to join in Brute Force in either of these unsupported scenarios, you receive the following message: No games available