FcLangSetAdd - add a language to a langset
#include <fontconfig.h> FcBool FcLangSetAdd(FcLangSet *ls); (const FcChar8 *lang); .fi
lang is added to ls. lang should be of the form Ll-Tt where Ll is a two or three letter language from ISO 639 and Tt is a territory from ISO 3166.
Fontconfig version 2.8.0 18 November 2009 FcLangSetAdd(3)