All puzzles presented at a WSPC are cultural- and language-neutral. For instance, puzzles based on logic, visual puzzles, puzzles with numbers. If words are used, it will be puzzles like fill-ins or word searches, where one does not need to know the meaning of the words.
Here are some example puzzle types:
More puzzle types will be added during the upcoming months.
There are already several websites with a long list of puzzle types, e.g. Puzzle List by ropeko, Puzzle List by janko, Logic Masters Germany – Puzzle Wiki. See also Links.