LINGUA SISTEMFRATER, "Brotherhood language," was invented in 1957 by Vietnamese linguist Pham Xuan Thai. It was made to be a very easy international language. The vocabulary contains about 1000 word roots. The words have a very broad meaning; for example, the word optik means both "eye" and "see." Other words can be made by combining the word roots. Opposites are formed with -ne; for example, fasil means "easy," fasilne means "difficult." The result is that the language can be learned very quickly.
The alphabet has only 18 letters: ABDEFGIJKLMNOPRSTU. Vowels are pronounced as they are in most languages. The only consonant pronounced differently from English is the J; it sounds like the letter Z (a French J should be close enough as well).
Grammar is simple as well. Sentence order is subject, verb, object. Words that describe other words come after those words.
A dictionary and the 12 rules of grammar can be found at the official website: