I made a small app for flash cards. It lets you edit the front and back of a card and then shows you the cards asking did you know what was there, SuperMemo style. It has a crude algorithm for picking which card to show next based on how long ago you saw it last and how well you know it.
The hosted deck has 5 cards with basic Polish to Russian words, but is tweakable to display any pair of texts without going into the scripts. The major change you may want to make is to change the font of back_field on the second card to the normal one.
Instructions are available inside, ask if you have any more questions.