The Pathfinder 2e multilingual feat says:
You easily pick up new languages. You learn two new languages, chosen from common languages, uncommon languages, and any others you have access to.
Uncommon character options, including languages, require some special feature to access. For example, Gnome Weapon Training grants access to Gnome weapons.
Does the multilingual feat allow a player to access an uncommon language that they don't have access to? The text of the feat says you can choose from "uncommon languages", it's just surprising to me that a player could get carte blanche access to any language they want.