Hi callimmak,
first, thank you for your offer to help translate HD Quiz into Italian! The current branch 1.x is not translation ready yet, but a future 2.x release will be. I’ll keep you in mind for when the time comes!
There is no limit to how many questions can be added to a quiz. However, your limit of 200 is very interesting. The page that lists all of your attached questions shows 200 at a time and you have to select the “NEXT QUESTIONS” button to see the next page of questions. This is done to help sites with poor/slow hosts.
If you do not see this button for some reason, then something on your site is probably limit how many items can appear in a single query. Luckily, I included an override for such an occasion.
You will need to edit your theme’s functions.php file to add the following line of code. NOTE: backup this file before making any changes.
If you add the following after the opening <?php in that file, you will be able to change how many questions can appear in that list before pagination.
define("HDQ_PER_PAGE", 200); Just change the 200 to a higher number, like 500 (or however many questions you have in your largest quiz).