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

"It is important to avoid being overly loud or aggressive while in Luxembourg, as these behaviors are seen as rude or even aggressive. Being on time to meetings and other social engagements should also be taken into account, as Luxembourgers value punctuality. Additionally, one should be respectful of religion and try to avoid making comments about religious or political matters, as this can be seen as offensive. Furthermore, dress codes for certain occasions should be respected and it is important to be polite and civil in conversations," said another expat in Luxembourg, Luxembourg.