"Thank you" or its equivalent in several Indian languages... Sanskrit, Hindi, Gujarati, Tamil.
Let me try first (gotta love the internet)...
Sanskrit: Anugurihiitosumi
Hindi: Dhanyawaad.
Gujarati: Aabhar or Dhanyawaad.
Tamil: Nandri, or Nangreeih, or Romba nanringa, or Rumba nandri.
Stress accents are missing though.
What's proper, when?