Yeah, I think you're right. The tagline can be improved.

I'm kind of doing a balancing act right now - I've built out CleverDeck to be a fully functional SRS that could be used for any subject, and I want to convey that. At the same time, people primarily use it for learning languages and I also want to communicate my dedication and efforts toward that particular niche.

I'm sure I can do a better job with messaging. Thanks for your feedback.