I doubt that Spanish-speaking countries have spelling contests. What words could they possibly use?
As far as I know, the only spelling errors Spanish speakers make are 1) writing "b" for "v" and vice versa, or 2) forgetting to write a silent "h" at the beginning of a word.
The Spanish for "chrysanthemum" (a famous English spelling-contest word) is "crisantemo."
A beginning Spanish student can read written Spanish aloud accurately, even without understanding any of it!
In Turkey, there is not such a competition in primary or secondary school. Because pronunciation of Turkish language is very easy and most of the words are pronounced exactly as they are spelled.
This is wonderful to have this competition in your country. Unfortunately, we don't have a similar challange in my country.
It is the first time to know about this event and I liked it a lot.