has no matching language, this function returns FcLangDifferentLang.
@@
+@RET@ FcStrSet *
+@FUNC@ FcLangSetGetLangs
+@TYPE1@ const FcLangSet * @ARG1@ ls
+@PURPOSE@ get the list of languages in the langset
+@DESC@
+Returns a string set of all languages in <parameter>langset</parameter>.
+@@
+
@RET@ FcStrSet *
@FUNC@ FcGetLangs
@TYPE1@ void