In 1986,
William Bright, then editor of the journal
Language, wrote of
Ethnologue that it "is indispensable for any reference shelf on the languages of the world". The 2003
International Encyclopedia of Linguistics described
Ethnologue as "a comprehensive listing of the world's languages, with genetic classification", and follows Ethnologue's classification. In 2006,
computational linguists John C. Paolillo and Anupam Das conducted a systematic evaluation of available information on language populations for the
UNESCO Institute for Statistics. They reported that
Ethnologue and
Linguasphere were the only comprehensive sources of information about language populations and that
Ethnologue had more specific information. They concluded that: "the language statistics available today in the form of the
Ethnologue population counts are already good enough to be useful" According to linguist
William Poser,
Ethnologue was, as of 2006, the "best single source of information" on language classification. In 2008 linguists
Lyle Campbell and Verónica Grondona highly commended
Ethnologue in
Language. They described it as a highly valuable catalogue of the world's languages that "has become the standard reference" and whose "usefulness is hard to overestimate". They concluded that
Ethnologue was "truly excellent, highly valuable, and the very best book of its sort available." In a review of
Ethnologue's 2009 edition in
Ethnopolitics,
Richard O. Collin, professor of politics, noted that "
Ethnologue has become a standard resource for scholars in the other social sciences: anthropologists, economists, sociologists and, obviously, sociolinguists". According to Collin,
Ethnologue is "stronger in languages spoken by indigenous peoples in economically less-developed portions of the world" and "when recent in-depth country-studies have been conducted, information can be very good; unfortunately [...] data are sometimes old". In 2012, linguist
Asya Pereltsvaig described
Ethnologue as "a reasonably good source of thorough and reliable geographical and demographic information about the world's languages". She added in 2021 that its maps "are generally fairly accurate although they often depict the linguistic situation as it once was or as someone might imagine it to be but not as it actually is". Linguist George Tucker Childs wrote in 2012 that: "
Ethnologue is the most widely referenced source for information on languages of the world", but he added that regarding African languages, "when evaluated against recent field experience [Ethnologue] seems at least out of date". In 2014,
Ethnologue admitted that some of its data was out-of-date and switched from a four-year publication cycle (in print and online) to yearly online updates. In 2017,
Robert Phillipson and
Tove Skutnabb-Kangas described
Ethnologue as "the most comprehensive global source list for (mostly oral) languages". According to the 2018
Oxford Research Encyclopedia of Linguistics,
Ethnologue is a "comprehensive, frequently updated [database] on languages and language families'. According to
quantitative linguists
Simon Greenhill,
Ethnologue offers, as of 2018, "sufficiently accurate reflections of speaker population size". Linguists Lyle Campbell and Kenneth Lee Rehg wrote in 2018 that
Ethnologue was "the best source that lists the non-endangered languages of the world". Lyle Campbell and Russell Barlow also noted that the 2017 edition of
Ethnologue "improved [its] classification markedly". They note that
Ethnologue's genealogy is similar to that of the
World Atlas of Language Structures (WALS) but different from that of the
Catalogue of Endangered Languages (ELCat) and Glottolog. Linguist
Lisa Matthewson commented in 2020 that
Ethnologue offers "accurate information about speaker numbers". In a 2021 review of
Ethnologue and Glottolog, linguist
Shobhana Chelliah noted that "For better or worse, the impact of the site is indeed considerable. [...] Clearly, the site has influence on the field of linguistics and beyond." She added that she, among other linguists, integrated
Ethnologue in her linguistics classes." According to linguist
Suzanne Romaine,
Ethnologue is also the leading source for research on
language diversity. According to
The Oxford Handbook of Language and Society,
Ethnologue is "the standard reference source for the listing and enumeration of Endangered Languages, and for all known and "living" languages of the world"." Similarly, linguist
David Bradley describes
Ethnologue as "the most comprehensive effort to document the level of endangerment in languages around the world." The US
National Science Foundation uses
Ethnologue to determine which languages are endangered. The University of Hawaii
Kaipuleohone language archive uses
Ethnologue's metadata as well. The
Rosetta Project uses
Ethnologue's language metadata. In 2005, linguist
Harald Hammarström wrote that
Ethnologue was consistent with specialist views most of the time and was a catalog "of very high absolute value and by far the best of its kind". In 2011, Hammarström created
Glottolog in response to the lack of a comprehensive language bibliography, especially in
Ethnologue. In 2015, Hammarström reviewed the 16th, 17th, and 18th editions of
Ethnologue and described the frequent lack of citations as its only "serious fault" from a scientific perspective. He concluded: "
Ethnologue is at present still better than any other nonderivative work of the same scope. [It] is an impressively comprehensive catalogue of world languages, and it is far superior to anything else produced prior to 2009. In particular, it is superior by virtue of being explicit." According to Hammarström, as of 2016,
Ethnologue and Glottolog are the only global-scale continually maintained inventories of the world's languages. The main difference is that
Ethnologue includes additional information (such as speaker numbers or vitality) but lacks systematic sources for the information given. In contrast, Glottolog provides no language context information but points to primary sources for further data. Contrary to
Ethnologue, Glottolog does not run its own surveys, As of 2019, Hammarström uses
Ethnologue in his articles, noting that it "has (unsourced, but) detailed information associated with each speech variety, such as speaker numbers and map location". In 2013, responding to feedback about the lack of references,
Ethnologue added a link on each language to language resources from the
Open Language Archives Community (OLAC)
Ethnologue acknowledges that it rarely quotes any source verbatim but cites sources wherever specific statements are directly attributed to them, and corrects missing attributions upon notification. The website provides a list of all of the references cited. In her 2021 review, Shobhana Chelliah noted that Glottolog aims to be better than
Ethnologue in language classification and genetic and areal relationships by using linguists' original sources. ==Editions==