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

"In Orleans, it is important to be mindful of dress etiquette. Wearing shorts and sleeveless tops may be seen as disrespectful in some of the city's churches, and inappropriate in some other places. Additionally, it is considered polite to greet each person with a kiss on the cheek when meeting or departing. Therefore, it is important to wait for the other person to initiate the greeting. Furthermore, it is important to respect the language of the region and avoid speaking English instead of French in public places. Finally, public displays of affection should remain subtle in the city," remarked another expat in Orleans, France, France.