What cultural faux pas should I try to avoid making in Bosnia & Herzegovina?

"It is important to be aware of cultural differences when visiting Bosnia & Herzegovina. It is important to be respectful of local customs and traditions, and to dress modestly. Avoid making negative comments about the country's history or politics, as this can be seen as offensive. It is also important to be aware of religious customs, and to be respectful of religious sites and symbols. Additionally, it is important to be aware of the local language and to avoid speaking English in public, as this can be seen as rude," remarked another expat who made the move to Bosnia & Herzegovina.