Vietnamese is a native and official language in Vietnam and is popularly widen to Vietnamese community throughout the world in East and Southeast Asia, North America, Australia and Western Europe. It is a tonal language with each syllable having six different tones which may change the definition. Vietnamese vocabulary was rooted from Chinese. Chữ Nôm used standard Chinese characters and some other words created by characters in own rules. The Vietnamese Alphabet (Chữ Quốc ngữ) is now from a Latin alphabet by Catholic missionaries in the 17th century with tones for own letters. Vietnamese language is considered to be a difficult language for foreigners.