This is a partial index of Wikipedia articles treating natural languages, arranged alphabetically and with (sub-) families mentioned. The list also includes extinct languages.

This list is incomplete; you can help by adding missing items. (June 2013)

For a published list of languages, see ISO 639-1 (list of ISO 639 language codes for 136 major languages), or for a more inclusive list, see ISO 639-3 (list of ISO 639-3 codes, 7,874 in total as of June 2013). The enumeration of languages and dialects can easily be taken into the five-digit range; the Linguasphere Observatory has a database (LS-2010) with more than 32,800 coded entries and more than 70,900 linguistic names.

• Constructed language and List of constructed languages
• Language (for information about language in general)
• Language observatory
• Languages used on the Internet
• List of fictional languages
• List of programming languages
• Lists of languages
• Sign language and List of sign languages