Vietnamese alphabet

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The Vietnamese alphabet (Vietnamese: chữ Quốc ngữ, lit. 'script of the national language' [t͡ɕɨ˦ˀ˥ kuək̚˧˦ ŋɨ˦ˀ˥] ) is a Latin-based modern writing script for the Vietnamese language. It has spelling conventions derived from the orthography of Romance languages such as Portuguese, Italian, and French. It was originally developed by the Portuguese missionary Francisco de Pina and other Jesuits in the early 17th century. The Vietnamese alphabet contains 29 letters, including 7 letters using four diacritics: ⟨ă⟩, ⟨â⟩, ⟨ê⟩, ⟨ô⟩, ⟨ơ⟩, ⟨ư⟩, and ⟨đ⟩. There are an additional 5 diacritics used to designate tone (as in ⟨à⟩, ⟨á⟩, ⟨ả⟩, ⟨ã⟩, and ⟨ạ⟩). The complex vowel system and the large number of letters with diacritics, which can stack twice on the same letter (e.g. nhất meaning 'first'), makes it easy to distinguish the Vietnamese orthography from other writing systems that use the Latin alphabet. The Vietnamese system's use of diacritics produces an accurate transcription for tones despite the...

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