Dzongkha. Nepali is also widely spoken.
• Visa required.
• Make sure your passport is valid for more than six months and has enough pages for stamps, especially if travelling via India or Nepal.
• Also bring another form of ID and a photocopy of your passport in case you lose it.
• March – Paro Tshechu. Celebrates Guru Rinpoche, who spread Tibetan Buddhism.
• September/October – Thimpu Drupchen. A sacred mask dance to appease Pelden Lhamo, the protecting deity.
Tipping is officially discouraged in Bhutan but is becoming more common. Tour guides generally expect to be tipped and many tour leaders circulate a collection to present to the guide at the end. When trekking it generally depends on whether they're already being paid for the use of their animals and how useful they've been around the camp.