The datepicker as part of jQuery UI, can be localized.
See
http://jqueryui.com/datepicker/#localization
Some plugins apply the datepicker e.g. data and bureaucracy plugins.
The default localization files are javascript files:
https://github.com/jquery/jquery-ui/tree/master/ui/i18n
Do we like to include these localization?
The default way of including doesn't help, because you cannot select current language:
e.g.
/* DOKUWIKI:include script/jquery.ui.datepicker-az.js */
/* DOKUWIKI:include script/jquery.ui.datepicker-pt-BR.js */
What do you think about introducing a placeholder like {LANG} ?
e.g. /* DOKUWIKI:include script/jquery.ui.datepicker-{LANG}.js */