Well, as an option, as we have in Russia such large lingua-centers or whatever.
You can agree to release a stylized version of them. Add their name somewhere prettier(sorry not rocked the program) About the cards in the dictionary there. You can even invent a separate functionality for them. For example alternative options of the transfer from the Lingva centre. And writing — Basic translation to read.
Well, vladochka with offices lingua across Russia, with phone numbers, addresses, Yes, even schedules. Generally you have a wishlist customers themselves tell, the main thing to offer.
Just the situation here is — you Want free, don't donate, don't download any of the banners on the Internet. There are generally three main option: Pays the user pays the sponsor, and donate. ) You get the only option with a sponsor more suited.
PS Lingva centre for example say, we in the city only they know.