Normally, he challenged himself to reach the equivalent of a B2 level in a language after three months. The B2 level—the fourth out of six levels beginning A1, A2, B1, and so on—is described by the Common European Framework of Reference for Languages (CEFR) as upper intermediate, allowing the speaker to “interact with a degree of fluency and spontaneity that makes regular interaction with native speakers quite possible without strain for either party.”
Yeah, mate, that's not considered fluency in language circles. It's great, don't get me wrong. People study languages for years without reaching that level. But it's not fluent, it's conversational--and early conversational at that. The kind of chitchat you might make with a shop clerk or new acquaintance. Most countries require a minimum of C1 for citizenship and university entrance because that's the point at which you're likely to manage all necessary daily tasks without too much strain. At B2 you're still getting confused by common idioms and flailing when trying to discuss the latest movie because you don't have the necessary vocabulary or advanced grammar to fully participate in society.
