FcLangSetSubtract(3) FcLangSetSubtract(3) NAME FcLangSetSubtract - Subtract langsets SYNOPSIS #include FcLangSet * FcLangSetSubtract (const FcLangSet *ls_a, const FcLangSet *ls_b); DESCRIPTION Returns a set including only those languages found in ls_a but not in ls_b. SINCE version 2.9.0 Fontconfig 2.18.3 23 August 2026 FcLangSetSubtract(3)