---
name: "FcLangSetContains"
section: "3"
platform: "linux"
package: "fontconfig"
version: "2:2.18.3-2"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/FcLangSetContains"
---

# FcLangSetContains(3)

check langset subset relation

## NAME

FcLangSetContains - check langset subset relation

## SYNOPSIS

**#include \<fontconfig/fontconfig.h\>**

**FcBool FcLangSetContains (const FcLangSet \****ls\_a***, const FcLangSet \****ls\_b***);**

## DESCRIPTION

**FcLangSetContains** returns FcTrue if *ls\_a* contains every language in *ls\_b*. *ls\_a* will 'contain' a language from *ls\_b* if *ls\_a* has exactly the language, or either the language or *ls\_a* has no territory.