How knowledgeable do moderators have to be of the language (pair) they moderate?

Site moderators are not required to have a specific level of knowledge in a given language to moderate in areas in which such language is used. Site moderators are appointed to greet and guide new participants to the forums and KudoZ, and help them to properly use and benefit from what is available to them at ProZ.com. Also, in conjunction with other moderators and site staff members, moderators are expected to help to maintain a constructive environment by carrying out enforcement of the site's rules in a consistent and structured manner. As long as the moderator can carry out with these two tasks, no specific level of language knowledge is required.