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The majority of Gmail users are outside the U.S., so it's no surprise that since we launched Gmail Labs last year, people around the world have been asking for these experimental features in their local languages. As of today, we're making Gmail Labs available internationally.
If your language is set to, say, Italian, you'll see a new page in Settings (or Impostazioni) called Labs. There, you'll find a list of experimental features you can choose to turn on -- everything from the useful (like offline access), to the arcane (like filter import/export), to the slightly ridiculous (like mail goggles). Most of these are translated to work in all of Gmail's supported languages except Hebrew, Arabic, and Urdu. Keep in mind that all Labs features are early experiments -- no design reviews, no product analysis, and not that much testing -- so they may occasionally break.