Many Uruguayans in tourist areas speak English, but learning some basic Spanish phrases shows respect.
It is common to greet others with a kiss on the cheek, even for first-time meetings. Punctuality is not common in Uruguay. Social events often start later than scheduled with guests often arriving up to an hour late. Meals are social events, and the time spent chatting at the table after eating, known as sobremesa, is valued. Don't rush your meals; enjoy the conversation and company. Drinking mate, a traditional herbal tea, is also a significant part of social life. If offered, it's polite to accept.
Uruguayans tend to dress conservatively. Even in casual settings, avoid overly casual attire like shorts and thongs/flip-flops unless you're at the beach.