Language & DialectsLanguage & Dialects

The Alternative Dictionaries international slang
The Alternative Russian Dictionary slang dictionary
American Dialect Society scholarly association dedicated to the study of the English language 

in North America - and of other languages, or dialects of other languages, influencing it or influenced by it
American Dialect Links some good sources, some not so good
American in the Mid-Atlantic States how they tawk on the East Coast
An American's Guide to Canadianisms one person's view
American Slanguages
Ariga: A Glossary of Yiddish Expressions
Bartlett's Quotations
Cambridge Dictionaries Online direct from Cambridge University Press 
Canadianisms
Chiasmus.com devoted to the literary and rhetorical device known as chiasmus
The Chinook Jargon trading pidgin of Northwest Indians and pioneers
Chronology of English how it came to be what it is and when
Cliche Finder for when you just can't hit the nail on the... uhm...
ClichéSite.com a list of clichés with definitions and explanations
UK Cockney Rhyming Slang complete with translator
The College Slang Research Project more of an historical document, since it dates from 1997
Dictionary of American Regional English visit for the free newsletters
  Dictionary of Newfoundland English
UK  Dictionary of Slang English slang and colloquialisms used in the United Kingdom
Drug Related Street Terms/Slang Words from Addictions.org
Elizabethan Accents the proper way to pronounce "yoiks"
English-Yiddish Online Dictionary
Ethnologue the separate languages, probable languages and dialects of the world 
The European Bureau for Lesser Used Languages of Europe's 370 million citizens,

 nearly 50 million speak a language other than the official language of the State in which they live
 Everyday English and Slang in Ireland
Evolution of Alphabets this is a lovely site, with animated depictions of the change in letters and alphabets
Food and Cooking Terminology: British to American
Foreignword 200+ online dictionaries for 67 languages, text translation and glossaries
Free Translation machine translation in six languages
Hieroglyphic Directory
The Human Languages Page this great resource returns after a brief delay
Language Tools online dictionary, thesaurus and translator
Languages of the World
The Linguistic Atlas Projects collection of projects that quantitatively describe American speech patterns
Linguistic Geography of the Mainland United States
Mercator overviews of territorial minority languages in the European Union and the media in those languages 
UK  Naval Terminology, Jargon and Slang
New Zealand English to U.S. English Dictionary
Nonverbal Dictionary of Gestures and Signs
The Old English Pages for the study of Old English and Anglo-Saxon England
UK  Online Dictionary of Playground Slang mostly British and quite enlightening
Online Rhyming Dictionary put in a word, get a rhyme
The Oxford Text Archive several thousand electronic texts in a variety of languages
The Oxford English Dictionary now online
Phonological Atlas of North America sound samples of regional dialect "shifts"
Phrase Origins this site is a piece of cake
Research-It dictionary, thesaurus, translator and more, all on one page
Reverse Dictionary type in the definition, you get the word
Roget's Internet Thesaurus
Selected Vocabulary Differences Between British and American English
Sign Language Dictionary Online manual alphabets, including foreign
Sioux Heritage: Lakota Sioux language dictionary and audio
The Spoken Yiddish Language Project the largest and geographically most diverse record of living Yiddish
Trivia About the English Language and Word Origins
United Kingdom English for the American Novice British (pardon the expression) colloquialisms
The Vocabula Review on language and words
Word for Word origins of unusual words and phrases
Word Spy recently coined words, existing words that have enjoyed a recent renaissance, 

and older words that are now being used in new ways
World Wide Words the history, quirks, curiosities and evolution of the English language
Your Dictionary index of language dictionaries