Does studying foreign language help?

Does studying foreign language help? I spent 3 weeks in continental Europe then 2 weeks studying German and just returned from a weekend in Montreal and my speech is the best it has ever been in my entire life. It's so good I wouldn't mind if it stays the same forever. Normally it's debilitating and considered severe. But for the past 2 weeks I've been talking with 90%+ fluency and it''s given me the courage to speak in situations I normally wouldn't. The foreign language is just a guess because of the timing. Anyone else have a similar experience of rapidly improving speech over the course of a few weeks? I'm 22 male if that's usefully.