Provided by: libfontconfig-doc_2.15.0-2.2ubuntu1_all 

NAME
FcLangSetUnion - Add langsets
SYNOPSIS
#include <fontconfig/fontconfig.h> FcLangSet * FcLangSetUnion (const FcLangSet *ls_a, const FcLangSet *ls_b);
DESCRIPTION
Returns a set including only those languages found in either ls_a or ls_b.
SINCE
version 2.9.0 Fontconfig 2.15.0 23 March 2025 FcLangSetUnion(3)