@classmethod<EOL><INDENT>def _get_languages(cls) -> set:<DEDENT>
cls._start_server_if_needed()<EOL>url = urllib.parse.urljoin(cls._url, '<STR_LIT>')<EOL>languages = set()<EOL>for e in cls._get_root(url, num_tries=<NUM_LIT:1>):<EOL><INDENT>languages.add(e.get('<STR_LIT>'))<EOL>languages.add(e.get('<STR_LIT>'))<EOL><DEDENT>return languages<EOL>
Get supported languages (by querying the server).