If you think "wiki" doesn't sound like English, you are right. But it's English now. This word born on the Pacific Island of Hawaii finally got an entry into the latest edition of the online Oxford English Dictionary along with 287 other new words.
It has earned it.
"Words are included in the dictionary on the basis of the documentary evidence that we have collected about them. A while ago this evidence suggested that wiki was starting to make a name for itself," OED chief editor John Simpson said in a statement.
"We tracked it for several years, researched its origins and finally decided it was time to include it in the dictionary,"
http://www.huffingtonpost.com/2007/03/15/oxford-english-dictionary_n_43528.html