Nice idea, could be me but a little more time would be nice, had all but two answers i believe but not time to think about the secret answer. Because it isnt one you d immediately know but you need to think about which countries are at that longitude with 7 letters etc. That takes time.
What does the asterisk mean for the question about most official languages? It's nice that Bolivia is an accepted type-in but it beats Zimbabwe 37 to 16, not sure why Zimbabwe is the displayed answer.