You can find attached to this sticky note all available
localizations of RadUpload for ASP.NET AJAX provided by our customers.
If you have any new localizations for RadUpload and would like to share
them with our community, you can send them via the support ticketing
system under your account.
You work will be gladly rewarded.
Here are some useful links relevant to the Localization:
P.S. Please, note that Telerik supports only the provided English (en-US) localizations in the Telerik.Web.UI installation and that the attached here localizations could be incomplete or could have mistakes.
P.S.2. If you want to update any language packs, you can use the following useful tool: http://www.screwturn.eu/(X(1)S(grc2ro551rnpa2eeviiyb5fn))/ResxSync.ashx. It can add new keys to the translated files whenever you have updated the original English files.
Another good diff and merge tool is WinMerge.