std::string const & polyglossia() const { return polyglossia_name_; }
/// polyglossia language options
std::string const & polyglossiaOpts() const { return polyglossia_opts_; }
+ /// Is this language only supported by polyglossia?
+ bool isPolyglossiaExclusive() const;
/// quotation marks style
std::string const & quoteStyle() const { return quote_style_; }
/// requirement (package, function)