+@FUNC@ FcGetDefaultLangs
+@TYPE1@ void
+@PURPOSE@ Get the default languages list
+@DESC@
+Returns a string set of the default languages according to the environment variables on the system.
+This function looks for them in order of FC_LANG, LC_ALL, LC_CTYPE and LANG then.
+If there are no valid values in those environment variables, "en" will be set as fallback.
+
+@RET@ FcStrSet *