What cultural faux pas should I try to avoid making in Waterloo?

"It is important to be respectful of local customs and traditions when visiting Waterloo. It is considered impolite to be loud or disruptive in public places, such as restaurants or shops. It is also important to dress modestly and to avoid public displays of affection. Additionally, it is important to be aware of the local language and to try to use it when interacting with locals. Finally, it is important to be respectful of religious beliefs and to avoid making jokes or comments about them," mentioned another expat when asked about moving to Waterloo, Belgium.