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

"When visiting Olomoucublic, it's important to respect the local customs and traditions to avoid any cultural faux pas. Here are some tips: Avoid speaking loudly in public places. Czech people value their personal space and quiet, so try to keep your voice down, especially in places like restaurants or public transportation. Do not assume everyone speaks English. While many Czechs do speak English, especially the younger generation, it's polite to ask if they speak English before starting a conversation. Avoid discussing sensitive historical topics such as World War II and communism unless you are well-informed about them. These periods had a significant impact on the Czech Republic and can be a sensitive subject for some. Do not leave a mess after yourself when visiting public places, including parks and historical sites. Czechs take pride in their clean and well-maintained public spaces. Avoid being overly familiar or touchy with people you've just met. Czechs are generally reserved and value their personal space. Do not refuse food or drink when offered at someone's home. It's considered polite to accept, even if you're not hungry or thirsty. Avoid making jokes about Czech beer. It's a source of national pride and joking about it might not be well received. Do not forget to say "Dobrý den" (Good day) when entering shops or restaurants and "Na shledanou" (Goodbye) when leaving. It's considered polite and shows respect to the locals. Lastly, tipping is customary in the Czech Republic. It's common to round up the bill or leave a 10% tip in restaurants," mentioned another expat when asked about moving to Olomouc, Czechia.