http://community.elgg.org/plugins/854839/1.0/pagehandler-hijack-18x
I created this plugin just for that purpose, though it only translates the first part (the actual page handler). In order to translate the 'all' portion you'd have to actually edit the plugins themselves en mass. Note that the pagehandler hijack does have an outstanding bug that makes it incompatible with certain plugins that also use the 'route', <handler> system - but otherwise it works ok.
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