When in Dublin, it's great to learn a few local sayings to really immerse yourself in the culture. A common expression you might hear is 'Craic', which refers to having a good time. If you want to learn some basic Irish language, the Duolingo app offers a good introduction to Irish phrases and words. Additionally, chatting with locals is a great way to pick up some common phrases.
When visiting Dublin, it is important to keep in mind that the Irish are friendly and generally informal people. It is customary to greet people with a smile and a handshake. When dining out, tipping is appreciated but not always expected. Around 10% in restaurants is common if service charge is not included. The attire is usually casual, but it's a good idea to dress slightly more formally when visiting religious sites or attending cultural events. Finally, the Irish enjoy engaging in conversation, so don't hesitate to strike up a chat with locals and experience the warmth of Irish hospitality.