Thanks! You actually can't atm. I've been using it personally for the last 8 months or so and have started to need/want a search function, so I'm going to implement it soon after my current priority which is localisation. Cool idea re embedded search, will look into it!
I have literally just implemented multi language analysis. When you speak to it in any language, the analysis will be returned in that language. The UI is in English, but I am updating this as the current priority - There'll be many major languages in an update in the next week or so.