Imagine you’ve just arrived in another country, you don’t speak the language, and you stumble upon a construction zone. The air is thick with dust. You’re tired. You still stink like airplane. You try to ignore the jackhammers to decipher what the signs say: Do you need to cross the street, or walk up another block, or turn around?I was in exactly such a situation this week, but I came prepared. I’d flown to Montreal to spend two days testing the new AI translation feature on Meta’s Ray-Ban smar...