Provided by: libfontconfig-doc_2.14.1-3ubuntu3_all 
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