I've always preferred the honorific "multilingual speaker" to "polyglot" since it sounds a whole lot nicer, but according to definition if a person "learns multiple languages as an avocation" they're a polyglot. And when a polyglot comes across another language enthusiast in the wild their conversation sounds like a trip around the world.
Dutch artist and polyglot Wouter Corduwener
chats with a Macedonian hyperpolyglot named Zoran Radiceski, who speaks
a staggering 35 different languages, in a conversation only a fellow
polyglot could follow!