The official language of Cambodia is Khmer. A part of the Mon-Khmer family and has its origins in Sanskrit and Pali from India and influenced by spoken and written Thai. It is spoken all over the country except in some tribal areas where local indigenous languages are used.
Today, English is the most popular foreign language in Cambodia. French is spoken by some of the older members of society and Chinese by many of the business people. Russian, Thai and Vietnamese is also in common use among business sectors and young generations.
Memory cards for digital camera could be found easily, but be careful with its quality. Image printing from both negative film and digital file are obtainable in Phnom Penh, Siem Reap and other big city.
Taking photographs at airports or military locations is forbidden and show your discretion and courtesy when photographing people, especially monks.