add ka_GE, ku_TR and ne_NP; some cleanup and better handling of sr_XX (patch 1858926)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@51864 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/langcodes.tex

@@ -231,6 +231,7 @@ in \helpref{wxLocale::Init}{wxlocaleinit} and are returned by
 \twocolitem{wxLANGUAGE\_UZBEK}{}
 \twocolitem{wxLANGUAGE\_UZBEK\_CYRILLIC}{}
 \twocolitem{wxLANGUAGE\_UZBEK\_LATIN}{}
+\twocolitem{wxLANGUAGE\_VALENCIAN}{}
 \twocolitem{wxLANGUAGE\_VIETNAMESE}{}
 \twocolitem{wxLANGUAGE\_VOLAPUK}{}
 \twocolitem{wxLANGUAGE\_WELSH}{}