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

"In Namur, it is considered rude to not greet people with a handshake or a kiss on the cheek. It's also important to respect the local language, which is French, so try to learn a few basic phrases. Belgians value punctuality, so being late for appointments or meetings is seen as disrespectful. It's also considered impolite to interrupt someone while they're speaking. When dining, keep your hands on the table (but not your elbows), and remember to say 'Bon appétit' before starting to eat. It's also customary to finish all the food on your plate as leaving food is seen as wasteful. Avoid discussing personal matters or controversial topics such as politics and religion in public, as Belgians generally prefer to keep their private lives private. Belgians are known for their modesty, so avoid boasting or showing off. They also value their personal space, so avoid standing too close to someone or touching them unless you know them well. Finally, tipping is not mandatory in Belgium, but it is appreciated. However, don't tip too much as it can be seen as ostentatious," remarked another expat in Namur, Belgium.