Lingua sistemfrater

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Lingua sistemfrater
Created by Pham Xuan Thai
Date 1957
Setting and usage International auxiliary language
Sources A posteriori language with a predominantly Romance vocabulary and an Asian-based grammar
Language codes
ISO 639-3 None (mis)
Glottolog None

Frater (lingua sistemfrater), an a posteriori international auxiliary language, published in Frater (Lingua sistemfrater). The simplest International Language Ever Constructed, in 1957 by the Vietnamese linguist Phạm Xuân Thái. The grammar can be compared to Indonesian language grammar.

Phạm Xuân Thái gave it more than 6,000 words for the usage of a very extensive vocabulary.


This language uses 18 letters:
"a, e, i, o, u" "b, d, f, g, j, k, l, m, n, p, r, s, t"

- help for best pronunciation:
"j" is pronounced as"z", "e" as "ei", and "o" as "ou". All the other letters have their normal pronunciation according to the International Phonetic Alphabet.


  • Pham Xuan Thai. "Frater (Lingua sistemfrater). The simplest International Language Ever Constructed". TU-HAI Publishing-House, Saigon (Republic of Vietnam), 1957.

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