Question: Vukajlija is similar to the online dictionary of slang founded in what year?

Context paragraphs:
Multitran: Multitran is an editable Russian multilingual online dictionary launched on 1 April 2001.  The English–Russian–English dictionary contains over four million entries, while the total database has about eight million entries.  The dictionary has a function for reporting translation errors for registered users.

Vukajlija: Vukajlija is a popular Serbia-based web site very similar to Urban Dictionary in content.  As such, the site mainly consists of often humorous definitions, observations and (not rarely vulgar) explanations of slang terms from a more local point of view that the one on Urban Dictionary.

Urban Dictionary: Urban Dictionary is a crowdsourced online dictionary of slang words and phrases that was founded in 1999 as a parody of Dictionary.com and Vocabulary.com by then-college freshman Aaron Peckham.  Some of the definitions on the website can be found as early as 1999, but most early definitions are from 2003.  At the start of 2014, the dictionary featured over seven million definitions, while 2,000 new daily entries were being added.  In November 2014, the Advertise page of the website states that, on a monthly basis, Urban Dictionary averages 72 million impressions and 18 million unique readers.  Anyone with either a Facebook or Gmail account can make a submission to the dictionary, and it has been stated that entries are reviewed by 20,000 volunteer editors.

Plattmakers: Plattmakers is a Low Saxon online dictionary project.  With more than 18,500 word entries (as of August 2013) it is one of the most extensive Low Saxon online dictionaries.  As each word entry can be rendered in several different Low Saxon varieties its effectively the most extensive Low Saxon dictionary available.

List of online dictionaries: An online dictionary is a dictionary that is accessible via the Internet through a web browser.  They can be made available in a number of ways: free, free with a paid subscription for extended or more professional content, or a paid-only service.  Some online dictionaries are organized as lists of words, similar to a glossary, while others offer search features, reverse lookups, and additional language tools and content such as verb conjugations, grammar references, and discussion forums.

Pseudodictionary: Pseudodictionary is an online dictionary for neologisms and protologisms.  It was founded in 2001.  Site visitors submit an original word or phrase for inclusion, giving a description and an example.  Unlike most collaborative dictionary websites, such as Urban Dictionary and Wiktionary, Pseudodictionary does not require the word already to have any current or common usage.  The site accepts words that have been made up on the spot, including words defined with a humorous intent.  Pseudodictionary has some content guidelines: no profanity, no toilet humour, and no racist, sexist, or offensive language.  Submittals are reviewed and edited before being posted.

Logos Dictionary: Logos Dictionary is a large multilingual online dictionary provided by Logos Group, a European translation company.  It was started in 1995, and as of 2005 contains over 7 million terms in over 200 languages, some of them minority languages as Breton, Leonese, Scots or Venetian.  The dictionary offers a variety of search options, and requires free registration in order to add or update translations.

Double-Tongued Dictionary: The Double-Tongued Dictionary is an online dictionary.  It catalogs a growing lexicon of undocumented or under-documented words on the fringes of English, focusing on slang, jargon, and new words.

Seslisözlük: Sesli Sozluk is a multilingual online dictionary, primarily English to Turkish and Turkish to English.  As of February 2009, it has a rank of 6 among all online dictionaries worldwide.  German, Italian, French, Spanish, Greek, Russian, Danish, Dutch, Polish and Portuguese translations are also provided.  The online dictionary also can be used in PDAs, SmartPhones, any phone supporting a web browser.

Grant Barrett: Grant Barrett (born 1970) is an American lexicographer, specializing in slang, jargon and new usage.  He is also co-host and co-producer of the nationwide public radio show "A Way With Words," author of "Perfect English Grammar" (Zephyros Press, 2016, ISBN  ), and editor of the "Official Dictionary of Unofficial English" (McGraw-Hill, 2006, ISBN  ), the "Oxford Dictionary of American Political Slang" (Oxford University Press, 2004, ISBN  ), and the award-winning web site Double-Tongued Dictionary.  He is also the vice president of communications and technology for the American Dialect Society, a former member of the editorial review board for the academic journal American Speech, former editor of the journal's "Among the New Words" column, and a founder of the online dictionary Wordnik.

Supporting paragraphs: Vukajlija Urban Dictionary
Answer: 1999