This is a great trick and it's clear from the gimmick alone (much less the instruction and
distraction information which is clear and detailed) that he's put a lot of thought and care into
this.
I also appreciate that you can customize this, since besides cards in many
languages, you can also get cards with no language and add your own. Even better, because of the way
it's printed, you can create your own cards if you're so inclined.
He also has a very
clear mnemonic device, that reduces memorization (if you can call it that) to about 30 seconds.
Well done.