| libxkbcommon 1.12.3
    Library implementing the XKB specification for parsing                           keyboard descriptions and handling keyboard state | 
#include <xkbregistry.h>
Opaque struct representing an ISO 639-3 code (e.g.
eng, fra). There is no guarantee that two identical ISO codes share the same struct. You must not rely on the pointer value of this struct.
See https://iso639-3.sil.org/code_tables/639/data for a list of codes.