Comment 1:
Language and country symbols can be combined. 
Comment 2:
If available and relevant, the content of geographical usage should be a country symbol as specified in ISO 3166-1 or one of the continent names. In more granular systems, specific regional names can be used, but should be declared elsewhere in the system for user understanding and coherence in the event of data exchange. The country symbol can optionally be preceded by a NOT operator to negate the content.