For the last few months, Fb's routinely appended locale/language designations to URIs, all too often referencing countries where I neither have nor want traffic, or it's strictly limited because of longtime problems (Brazil; Indonesia; Russia; Turkey).
To date I've not redirected/rewritted the "?fb_locale="-renamed files but technically, they don't exist. And they're starting to bug me. Here's today's rash, three hours of hits to the exact same plain html file, (and only one or two to any graphics, unlike 'regular' Fb traffic):
UA: facebookexternalhit/1.1 (+http://www.facebook.com/externalhit_uatext.php)
(That IP's Facebook Ireland, a newish one for me: 220.127.116.11 - 18.104.22.168; 22.214.171.124/18)
Variations on the above URIs include these root-level hits:
There's even a second Spanish(?) version:
Do you see the same Fb hits 'including' non-English locales? Do you know their purpose at Fb's end of things? A country-localized search database in the works? They don't appear to be from other sites' links using Fb buttons or some such, ditto real-person posts.
And if you're seeing them, are you ignoring them?