Provided by: libfontconfig1-dev_2.13.1-2ubuntu3_amd64 

NAME
FcLangNormalize - Normalize the language string
SYNOPSIS
#include <fontconfig/fontconfig.h>
FcChar8 * FcLangNormalize (const FcChar8 *lang);
DESCRIPTION
Returns a string to make lang suitable on fontconfig.
SINCE
version 2.10.91
Fontconfig 2.13.1 06 April 2020 FcLangNormalize(3)