Hindi:
* Namaste: This is the most widely used greeting, meaning "I bow to you." It's respectful and used across religions.
* "Kya haal hai?" (How are you?)
* "Subha shubh prabhat!" (Good morning!)
* "Shubh ratri!" (Good night!)
Other languages:
* "Vanakkam" (Tamil): A common greeting in South India.
* "Shubham" (Malayalam): Another popular greeting in Kerala.
* "Namaskar" (Bengali): Widely used in West Bengal.
* "Salam" (Urdu): Used by Muslims.
* "Sat Sri Akal" (Punjabi): Used by Sikhs.
English is also widely spoken:
* "Hello" is commonly used, especially in urban areas.
Tips:
* Use "Namaste" as a safe bet for most situations.
* Learn the local language for a more personalized touch.
* A smile and a warm welcome are appreciated everywhere.
Remember, India is a vast and diverse country with numerous languages and customs. Always be respectful and open to different ways of greeting.