Barallete

Barallete is a largely vanished argot which used to be employed by the traditional knife-sharpeners and umbrella-repairers ("afiadores e paragüeiros") of the Galician province of Ourense, in Spain. 
It was based on the Galician language as spoken in Ourense, but its users substituted everyday words with invented ones of no linguistic connection, making it impossible for other people to understand it.
An example of Barallete is:
The same sentence in standard Galician:
Barallete is said to have arisen in the twelfth century, and many words and phrases from this argot have been published in various recent works of fiction and non-fiction. 