As far as I can tell, the Web Inspector is not localizable.
Correct, we should make it localizable.
<rdar://problem/5166137>
Created attachment 17363 [details] Patch
Landed in r27883. http://trac.webkit.org/projects/webkit/changeset/27883
Comment on attachment 17363 [details] Patch Reviewed by Mark Rowe, according to the ChangeLog.