The United States of America starts with a T.
Happy? (starts with an H)
What I object to is that, if you're going to give a clue in Spanish (or any language) make it correct. In Spanish, it is LOS ESTADOS UNIDOS.
As is, 12/18 seems about right. I don't think Lake Erie counts as it exists on the border between the US and Canada. One of the 12 is really a question about the Spanish language, and another you can answer more easily if you speak French than if you know much about the US. Which "E" answers that would be guessed by more than 21% of quiz takers do you think should have been included? They could have thrown on something about empanadas but then you'd see the complaints from people that don't understand what geography can mean.
The Americas geography by letter A, excluding the U.S.