When visiting Nainital, it's helpful to know some basic phrases in Hindi. Common greetings like 'Namaste' for hello and 'Dhanyavad' for thank you can go a long way. It's also handy to have a few numbers and directions in Hindi to assist with navigation. Learning these phrases can enhance your experience and interaction with locals. Resources like language apps or guidebooks can provide useful tools for learning these basic words and expressions.