I'm using webkit on OSX in german. If right-clicking on a link to open a context menu on a web page the language of the entries is mixed up. Some are in german others in english. This only appears within pages. If right-clicking on parts of the UI the context menu's entries are completely in german.
As example i added 2 screeshots of the menu: one with the correct german localization from Safari 3.2.1 (safari_german) and one from webkit r41018 (webkit_german) with the mixed up language
Created attachment 27695 [details] Correct german context menu from Safari
Created attachment 27696 [details] Context menu with mixed up language from webkit
The strings in German are from Safari itself. The strings that appear in English are those from the WebKit framework. The WebKit frameworks in the nightly builds are not localized so they'll only ever return English strings. The only thing we could possibly do here would be to force Safari to use English, but that doesn't seem like a great idea either.