Hi, this is a fun idea!
In the Czech Republic, we have superstitions such as these:
Spilling salt means 7 years of bad luck.
Walking under a stepladder means bad luck.
A black cat crossing your way means bad luck.
Touching a chimneysweep means good luck.
If you lose and eyelash, catch it on your finger, wish something and the blow it away, the wish should come true.
Knock on wood three times if you don't want to jinx something!