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

"In Lausanne, it is considered rude to be late for appointments or meetings, as punctuality is highly valued. It's also important to avoid discussing personal matters or asking personal questions in professional settings, as the Swiss value their privacy. When dining, it's considered impolite to start eating before everyone has been served. Also, keep in mind that tipping is not mandatory in Switzerland, as service charges are included in the bill, but it's common to round up to the nearest franc. Avoid littering or making loud noises in public places, as the Swiss take pride in their clean and peaceful environment. In conversation, avoid making jokes about Swiss neutrality or their banking system, as these topics can be sensitive. It's also important to respect the local languages. Lausanne is located in the French-speaking part of Switzerland, so attempt to use some basic French phrases, even if your French is not fluent. Lastly, the Swiss are known for their directness, so don't take it personally if they seem blunt or straightforward. It's just part of their communication style," remarked another expat in Lausanne, Switzerland.