The Vatican brings AI live translation to Mass

Step inside one of the most sacred and historic sanctuaries on Earth, and right past the centuries-old marble pillars, you will now spot a modern QR code.

The Papal Basilica of Saint Peter in the Vatican has partnered with language service provider Translated to roll out AI-assisted live translation in 60 languages for Holy Mass attendees. Starting next week, visitors can scan a QR code at designated points inside the basilica to get instant audio and text translations delivered straight to their smartphone browsers.

There is no app to download, no rented headset, and no registration barrier.

Putting an AI translator in a 400-year-old sanctuary

The technology behind this service is Lara, a specialized translation AI launched by Translated in 2024. Translated claims the tool is refined using the linguistic sensitivity and insights of more than 500,000 professional native-speaking translators.

To tailor the engine for the Vatican, Translated teamed up with Carnegie-AI, a robotics and AI spin-off from Carnegie Mellon University. Computer science professor Alexander Waibel helped guide the development alongside Translated CEO and co-founder Marco Trombetti, aiming to turn cross-lingual AI into a bridge for shared human understanding.

The timing is hardly accidental. The Vatican is marking the 400th anniversary of the Basilica's dedication, with major celebrations set for November 18. Cardinal Mauro Gambetti, Archpriest of the Basilica, noted that Saint Peter's has always welcomed people of every tongue, calling the technology an instrument of communion when guided by faith.

Why it matters

For regular worshippers and international tourists, the value is immediate and obvious. Anyone who has attended a service in Latin or an unfamiliar language knows how quickly you become a passive bystander. Making live audio and text available via a simple web page removes friction entirely; no one wants to download a heavy native app over spotty mobile data in a crowded cathedral.

For the translation industry, the Vatican is arguably the highest-stakes test environment imaginable. Religious liturgy requires extreme doctrinal accuracy, reverent tone, and absolute contextual sensitivity. One mistranslated theological term can cause serious friction, so letting an AI take the mic signals massive corporate confidence from Translated.

We think opting for a zero-install web architecture is the smartest choice Translated could make here. Still, the setup faces real-world hurdles. High-density church crowds are notorious for killing cellular bandwidth, and handling multi-speaker liturgical chanting with zero latency across 60 languages will test whether Lara can truly perform under sacred pressure.