Lists of languages

• SIL International's Ethnologue: Languages of the World lists over 7,100 spoken and signed languages.
• The International Organization for Standardization (ISO) assigns codes for most languages; see ISO 639
  • List of ISO 639-1 codes – two-letter codes (184 major languages)
  • List of ISO 639-2 codes – three-letter codes
  • ISO 639 macrolanguage – ISO 639-2 codes used as ISO 639-3 codes
  • List of ISO 639-3 codes – three-letter codes, intended to "cover all known natural languages"
  • List of ISO 639-5 codes – three-letter codes for language families and groups
• IETF language tag – depends on ISO 639, but provides various expansion mechanisms
• Glottolog
• Linguasphere Observatory (LS-2010, totaling over 32,800 coded entries and over 70,900 linguistic names)

• Index of language articles

Lists which are global in scope (all living natural languages would classify for inclusion):

• by country:
  • List of official languages by country and territory
  • Number of languages by country
• by name: List of language names (native names)
• by phylogenetic relation: List of language families (phylogenetic)
  • by primary language family: List of Afro-Asiatic languages, List of Austronesian languages, List of Indo-European languages, List of Mongolic languages, List of Tungusic languages, List of Turkic languages, List of Uralic languages.
• chronologically: List of languages by first written accounts
• by number of speakers:
  • List of languages by total number of speakers
  • List of languages by number of native speakers
• List of languages by number of words according to authoritative dictionaries

• Languages of Africa
• Indigenous languages of the Americas
  • List of Native American languages acquired by children
  • Languages of North America
  • Languages of South America
• Languages of Asia
  • East Asian languages
  • Languages of South Asia
  • Languages of Southeast Asia
• Languages of Europe
  • Languages of Russia
• Languages of Oceania

Extinct, endangered or revived languages

• Lists of extinct languages
  • List of languages by time of extinction
• Lists of endangered languages
• List of revived languages
• Regional language

• List of lingua francas
• List of official languages
  • List of official languages by state
  • List of official languages by institution
• Languages used on the Internet (includes a list of languages with the most prevalence online)
• List of mutually intelligible languages

• List of creole languages
• List of mixed languages
• List of pidgins, creoles, mixed languages and cants based on Indo-European languages
  • List of English-based pidgins
• List of sign languages
  • List of sign languages by number of native signers
• List of constructed languages

• List of language self-study programs
• List of most commonly learned foreign languages in the United States
• List of linguists
• List of shorthand systems
• List of writing systems
• Lists of dialects and varieties
• Lists of computer languages
  • Lists of programming languages
  • List of ontology languages
  • List of modeling languages
  • List of markup languages
• Omniglot