An estimated 85% of Indonesians are Muslims. Giving or receiving with the left hand is considered to be impolite, while touching of heads is absolutely out of the question.
Bahasa Indonesia is the national language, but English is widely spoken and certainly on the golf course as well as in hotels and in the better shopping areas. It is wise to travel with a guide, who can be of great help to you when it comes to negotiating prices at markets. Indonesian traders love negotiating, so don’t be shy.