Answer:
No le digas malas palabras.
Explanation:
"dile malas palabras" ⇔ "no le digas malas palabras"
1. what do you want to see when we go to the theater?
2. where do we have to buy the entrance?
3. can you understand a movie in Spanish?
4. what do you want to see when we go to the museum?
5. what does the painter paint?