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