Can you read on Wikipedia:
The Tanga (Portuguese from TupiGuarani language tanga for "loincloth") is reduced to bands and two normally equal fabric triangles base a bikini Brazilian origin.
The term Tanga, actually thong panties has also naturalized fürSlips in the German language, which are worn as underwear. He has around the waist just a thinly sliced collar or bands and covers the buttocks completely about 50% and dieGenitalien.
A string G-string or thong called a slip or a panty that is behind only from a tight fabric triangle and / or bands and the buttocks can completely or partially uncovered.
String is just a "thread" as in the crevice. Tange is usually a little substance to the pelvis or buttocks.