Demoed on stage at Google's event today, this feature lets two Pixel Bud wearers chat in their native languages by translating conversations in real-time. In the demo, a native English speaker and a native Swedish speaker had a conversation with each other, both using their native languages. Google Translate in the Buds' translated the English phrases into Swedish, and the Swedish phrases into English, for each user. There was barely any lag time in between the speaker saying a phrase and the Buds' hearing those words and translating them into the appropriate language.
You’ll need a Pixel 2 to take advantage of this feature unfortunately. I chatted with a member of the Pixel Buds team following the demonstration and she confirmed that the demo was done entirely over the internet, without downloading the languages directly to the device. You just have to touch and hold the right earbud and the Pixel Buds take off. You can use touch controls for other things like pausing music and calling up the Assistant. The fun is all for Android users, if you’re rocking an iPhone the Pixel Buds are just a pair of headphones. The device comes in a rechargeable case that allows for 24 hours total battery time and tuns about 5 hours between charges.