In Wikipedia: Belarusian.

Belarusian is spoken in:

Read the Belarusian translation of the Universal Declaration of Human Rights.

Translation to and from Belarusian is supported by Google Translate.

Alongside the breadcrumbs for this item which shows its "ancestry" in concept space, the Child items tab lists its descendants, and the Siblings items tab the concepts that exist under the item's "parent item".