Before revision: By the beginning of the first decade of the 21st century, it had become common for science-fiction and fantasy works set in other worlds to feature constructed languages, or more commonly, an extremely limited but defined vocabulary which suggests the existence of a complete language, or whatever portions of the language are needed for the story , and constructed .
After revision: By the beginning of the first decade of the 21st century, it had become common for science fiction and fantasy works set in other worlds to feature constructed languages, or more commonly, an extremely limited but defined vocabulary which suggests the existence of a complete language, or whatever portions of the language are needed for the story .