I think it could fit even more domains using a Bloom Filter or similar probabilistic data structure. With a chance of false-positives of course. But that's a trade-off the project already makes.

Why wait? Book a flight to Yunnan, order a tasty mushroom soup or get a fresh batch from the markets.

Delegating stuff to Google (more recently AI) and repeating back the result, is one of my core functions at work next to programming.

A co-worker I'd just tell to RTFM when it's bothering me. Higher up the hierarchy, the egos are more fragile and I'm afraid the can't take it.