Oh wow, this is _exactly_ what I've been looking for lately. You might want to work on your advertising, because I've literally been looking for exactly this, because I'm currently learning Spanish, and never came across your app. I thought about asking Instapaper or someone to implement clickable word translation, or even considered writing my own web app.. I'm stupid enough that I never even thought about turning it into a business. But I'm happy that now I don't have to! I'll test it on my Android e-paper tablet for you and post a review.