"The alphaDictionary language resource site, that offers a wide variety of language materials intended to help its visitors learn and master anything they need to know about their native language or other languages. It has an archive of language jokes, language games, and lots of English language resources."
An authoritative source of rich, structured data for both the general public and linguistic experts. Each of the 191 chapters is written by an expert and devoted to a single language. Three indexes are included for cross reference:
This authoritative reference source offers a comprehensive range of articles on contemporary language teaching and its history, it has been produced specifically for language teaching professionals and as a reference work for academic studies at postgraduate level.
The older edition is available in print: in Langsam stacks (P51 .R66 2000 _
Facts about the World's Languages by 
Routledge Encyclopedia of Language Teaching and Learning by 