Barring English, I only speak "dead" languages. Am I a polyglot still? Latin, Koine & Classic Greek, ancient Hebrew, Aramaic, and am at "coffee" level in a few ANE/Semitic languages.
Dead languages, might not be dead for very long, machines do better in grammar and syntax nowadays.
The point in asking? I only know a single language that is spoken outside of schools, I'm curious if those dead languages still qualify for "polyglot" status. Seems the definition is nebulous.