Language/Multiple-languages/Culture/Licensed-Free-Databases
The listed are databases, not applications. That is to say, if you don't know programming, maybe they won't help you so much.
Multiple languages
https://dumps.wikimedia.org/
License: https://dumps.wikimedia.org/legal.html
Some of its users: https://www.wikimedia.org/
Wikimedia.
https://iate.europa.eu/download-iate/
License: https://iate.europa.eu/download-iate/
Some of its users: https://iate.europa.eu/download-iate/
Terminology dictionary of the EU.
https://tatoeba.org/eng/downloads/
License: https://tatoeba.org/eng/downloads/
Some of its users: https://tatoeba.org/, http://www.listeningpractice.org/, https://jisho.org/
Parallel corpora. In common words, collections about a sentence in different languages.
https://wiki.documentfoundation.org/Language_support_of_LibreOffice
License: https://wiki.documentfoundation.org/Language_support_of_LibreOffice
Some of its users: https://www.libreoffice.org/
You can find the “Spell check dictionaries” and other useful things.
http://www.gutenberg.org/wiki/Gutenberg:Information_About_Robot_Access_to_our_Pages
License: http://www.gutenberg.org/wiki/Gutenberg:Terms_of_Use
Some of its users: http://www.gutenberg.org/, https://librivox.org/ LibriVox
Ebooks.
https://librivox.org/pages/about-librivox/
License: https://librivox.org/pages/about-librivox/
Some of its users: https://librivox.org/, http://www.listeningpractice.org/
Audio books.
https://freedict.org/downloads/
License: https://freedict.org/about/
Some of its users: http://aarddict.org/
Dictionaries.
http://www.omegawiki.org/Help:Downloading_the_data
License: http://www.omegawiki.org/Meta:Main_Page
Some of its users: http://www.omegawiki.org/Meta:Main_Page, http://dictionarymid.sourceforge.net/
Dictionaries.
http://www.xobdo.org/downloads/
License: http://www.xobdo.org/downloads/
Some of its users: http://www.xobdo.org/
Dictionaries for South Asian languages and English.
https://ltrc.iiit.ac.in/onlineServices/Dictionaries/Dict_Frame.html
License: https://ltrc.iiit.ac.in/onlineServices/Dictionaries/GPLHelp.html
Dictionaries for South Asian languages and English.
http://compling.hss.ntu.edu.sg/omw/
License: http://compling.hss.ntu.edu.sg/omw/
Some of its users: http://compling.hss.ntu.edu.sg/omw/cgi-bin/wn-gridx.cgi?gridmode=grid
Wordnets.
http://www.dicto.org.ru/xdxf.html
License: http://dicto.org.ru/license.html
Some of its users: http://dicto.org.ru/
Repository of dictionaries (from elsewhere).
http://shtooka.net/download.php
License: http://shtooka.net/
Collections of audio.
https://en.wiktionary.org/wiki/Wiktionary:Frequency_lists
License: https://en.wiktionary.org/wiki/Wiktionary:Frequency_lists
Frequency lists.
https://lego.linguistlist.org/about#contact
License: https://lego.linguistlist.org/about#copyright
Some of its users: https://lego.linguistlist.org/
Lexicon. No download link on the website.
https://panlex.org/source-list/
License: https://panlex.org/license/
Some of its users: https://glosbe.com
Lexical database links.
http://cjklib.org/0.3/
License: http://cjklib.org/0.3/
Some of its users: https://www.skishore.me/makemeahanzi/
Data about Han script.
https://www.radio-browser.info/gui/#!/
License: https://www.radio-browser.info/gui/#!/
Some of its users: https://github.com/segler-alex/RadioDroid
Database of radio stations.
https://help.archive.org/hc/en-us/articles/360017781111-How-to-download-files-
License: https://www.archive.org/about/terms.php
Some of its users: https://www.archive.org/
Archived Internet content.
American Sign Language
http://www.asl-lex.org/
License: http://www.asl-lex.org/
Lexicon.
Burmese
https://github.com/saturngod/ornagai-V2
License: https://github.com/saturngod/ornagai-V2/blob/master/License
Some of its users: https://www.ornagai.com/#/
Dictionary.
Catalan
http://www.catalandictionary.org/en/search/
License: http://www.catalandictionary.org/en/search/
Dictionary. Font of license is too small.
Chinese
https://resources.publicense.moe.edu.tw/index.html
License: https://resources.publicense.moe.edu.tw/index.html
Some of its users: https://resources.publicense.moe.edu.tw/index.html, https://www.moedict.tw/
Dictionaries of ROC Mandarin Chinese written in ROC Mandarin Chinese.
https://cc-cedict.org/editor/editor.php
License: https://cc-cedict.org/wiki/
Some of its users: https://www.mdbg.net/chinese/dictionary, https://www.pleco.com/
Mandarin-English dictionary.
https://chine.in/mandarin/dictionnaire/CFDICT/
License: https://chine.in/mandarin/dictionnaire/CFDICT/
Some of its users: https://chine.in/, https://www.pleco.com/
Mandarin-French dictionary.
http://www.handedict.de/chinesisch_deutsch.php
License: http://www.handedict.de/chinesisch_deutsch.php?mode=dl&sid=51394be2b6d9cba75946e929b5477d55
Some of its users: http://www.handedict.de/, https://www.pleco.com/
Mandarin-German dictionary.
https://chdict.zydeo.net/en/download/
License: https://chdict.zydeo.net/en/download/
Some of its users: https://chdict.zydeo.net/hu/
Mandarin-Hungarian dictionary.
http://cantonese.org/download.html
License: http://cantonese.org/download.html
Some of its users: http://cantonese.org/, https://www.pleco.com/
Cantonese-English dictionary.
https://twblg.dict.edu.tw/holodict_new/compile1_6_1.jsp
License: https://twblg.dict.edu.tw/holodict_new/compile1_6_1.jsp
Some of its users: https://twblg.dict.edu.tw/holodict_new/default.jsp, https://www.moedict.tw/
Taiwanese-Endlish dictionary. It can be requested through email.
http://www.taiwanesedictionary.org/
License: http://www.taiwanesedictionary.org/
Taiwanese-English dictionary.
http://lingua.mtsu.edu/chinese-computing/
License: http://lingua.mtsu.edu/chinese-computing/copyright.html
Frequency lists.
Esperanto
http://reta-vortaro.de/tgz/index.html
License: http://reta-vortaro.de/tgz/index.html
Some of its users: http://reta-vortaro.de/, http://www.busydoingnothing.co.uk/prevo/
Dictionary in several languages.
http://www.denisowski.org/Esperanto/ESPDIC/espdic_readme.html
License: http://www.denisowski.org/Esperanto/ESPDIC/espdic_readme.html
Some of its users: http://www.denisowski.org/Esperanto/ESPDIC/espdic_readme.html
Dictionary.
https://komputeko.net/elsxutejo-en.php
License: https://komputeko.net/index_en.php
Some of its users: https://komputeko.net/index_en.php
Computer terminology dictionary.
German Sign Language
https://signdict.org/
License: https://signdict.org/about
Some of its users: https://signdict.org/
Dictionary.
English
http://gcide.gnu.org.ua/download
License: http://gcide.gnu.org.ua/license
Some of its users: http://gcide.gnu.org.ua/
Dictionary of definition.
https://foldoc.org/source.html
License: https://foldoc.org/Free+On-line+Dictionary
Some of its users: https://foldoc.org/
Dictionary about computing.
German
https://www.openthesaurus.de/about/download/
License: https://www.openthesaurus.de/about/download/
Some of its users: https://www.openthesaurus.de/about/download/
Thesaurus.
Hindi
http://www.cfilt.iitb.ac.in/~hdict/webinterface_user/downloaderInfo.php
License: http://www.cfilt.iitb.ac.in/~hdict/webinterface_user/index.php
Some of its users: http://www.cfilt.iitb.ac.in/~hdict/webinterface_user/dict_search_user.php
Dictionary. Application is required.
Icelandic
https://www.ling.upenn.edu/~kurisuto/germanic/oi_cleasbyvigfusson_about.html
License: http://lexicon.ff.cuni.cz/txt/oi_cleasbyvigfusson.txt
Dictionary.
Interlingua
http://www.denisowski.org/Interlingua/IEDICT/iedict_readme.html
License: http://www.denisowski.org/Interlingua/IEDICT/iedict_readme.html
Some of its users: http://www.denisowski.org/Interlingua/IEDICT/iedict_readme.html
Dictionary.
Interlingue
https://github.com/Carmina16/hunspell-ie
License: https://github.com/Carmina16/hunspell-ie/blob/master/LICENSE
Spell checker with dictionary.
Iranian Persian
https://github.com/amirshnll/English-Persian-Word-Database
License: https://github.com/amirshnll/English-Persian-Word-Database/blob/master/LICENSE
Dictionary.
Japanese
http://www.edrdg.org/wiki/index.php/Main_Page
License: https://www.edrdg.org/edrdg/licence.html
Some of its users: https://jisho.org/, https://www.tagaini.net/
Japanese dictionaries.
https://www.wadoku.de/wiki/display/WAD/Downloads+und+Links
License: https://www.wadoku.de/wiki/pages/viewpage.action?pageId=357
Some of its users: https://www.wadoku.de/
Japanese-German dictionary.
https://github.com/KanjiVG/kanjivg/releases/
License: http://kanjivg.tagaini.net/
Some of its users: https://www.tagaini.net/, https://jisho.org/
Kanji strokes.
https://joyokanji.info/
License: http://www.bunka.go.jp/bunkacho_homepage/index.html, http://www.mext.go.jp/b_menu/about_link.htm, http://www.moj.go.jp/term.html
Some of its users: https://joyokanji.info/
Jōyō Kanji, Jinmeiyō Kanji, Kyōiku Kanji in a easy-to-copy form.
http://dico.fj.free.fr/dico.php
License: http://dico.fj.free.fr/copyright.php
Some of its users: http://dico.fj.free.fr/traduction/index.php
Japanese-French dictionary.
Jeju
https://jeju.go.kr/culture/dialect/dictionary.htm
License: https://jeju.go.kr/help/policy/copyright.htm
Some of its users: https://jeju.go.kr/culture/dialect/dictionary.htm
Dictionary.
Klingon
http://klingonska.org/dict/dict.zdb
License: http://klingonska.org/dict/
Some of its users: http://klingonska.org/dict/
Dictionary.
Korean
https://krdict.korean.go.kr/mainAction
License: https://krdict.korean.go.kr/kboardPolicy/copyRightTermsInfo
Some of its users: https://krdict.korean.go.kr/mainAction
Dictionary. Download link is unknown.
https://opendict.korean.go.kr/main
License: https://opendict.korean.go.kr/service/copyrightPolicy
Some of its users: https://opendict.korean.go.kr/main
Dictionary. Download link is unknown.
https://stdict.korean.go.kr/main/main.do
License: https://stdict.korean.go.kr/join/copyrightPolicy.do
Some of its users: https://stdict.korean.go.kr/main/main.do
Dictionary. Download link is unknown.
https://github.com/libhangul/libhangul/blob/master/data/hanja/hanja.txt
License: https://github.com/libhangul/libhangul/blob/master/data/hanja/hanja.txt
Words in Hangul and Hanja.
There is a page of introduction: https://wiki.kldp.org/wiki.php/libhangul.
https://ko.wiktionary.org/wiki/%EB%B6%80%EB%A1%9D:%ED%95%9C%EB%AC%B8_%EA%B5%90%EC%9C%A1%EC%9A%A9_%EA%B8%B0%EC%B4%88_%ED%95%9C%EC%9E%90_1800
License: http://www.suneung.re.kr/sub/info.do?m=0601&s=suneung
http://www.suneung.re.kr/boardCnts/fileDown.do?fileSeq=59692112e521efa80d2af27916704082 in a easy-to-copy form.
Lithuanian
https://github.com/ispell-lt/ispell-lt
License: https://github.com/ispell-lt/ispell-lt/blob/master/COPYING
Spell checker with dictionary.
Russian
https://en.openrussian.org/dictionary
License: https://en.openrussian.org/dictionary
Some of its users: https://en.openrussian.org/
Dictionary.
Slovak
http://sk-spell.sk.cx/hunspell-sk
License: http://sk-spell.sk.cx/hunspell-sk
Spell checker with dictionary.
Vietnamese
http://www.informatik.uni-leipzig.de/~duc/Dict/install.html
License: http://www.informatik.uni-leipzig.de/~duc/Dict/install.html
Some of its users: https://www.informatik.uni-leipzig.de/~duc/Dict/
Dictionaries in several languages.
There is a page of introduction: https://vi.wiktionary.org/wiki/Wiktionary:Ngu%E1%BB%93n_g%E1%BB%91c/FVDP
http://www.denisowski.org/Vietnamese/vnedict_readme.htm
License: http://www.denisowski.org/Vietnamese/vnedict_readme.htm
Some of its users: http://www.denisowski.org/Vietnamese/vnedict_readme.htm
Dictionary.
https://github.com/duyetdev/vietnamese-wordlist
License: https://github.com/duyetdev/vietnamese-wordlist/blob/master/LICENSE
Word list.
https://github.com/duyetdev/vietnamese-namedb
License: https://github.com/duyetdev/vietnamese-namedb/blob/master/LICENSE
Name list.
Non-language
https://unicode.org/ucd/
License: https://www.unicode.org/copyright.html
Some of its users: https://wiki.gnome.org/action/show/Apps/Gucharmap, http://www.decodeunicode.org/, https://unicode-table.com/en/, https://www.fontspace.com/
Unicode.
https://www.cia.gov/library/publications/download/
License: https://www.cia.gov/library/publications/the-world-factbook/docs/contributor_copyright.html
Some of its users: https://www.cia.gov/library/publications/resources/the-world-factbook/
General facts about countries and regions.
https://www.geonames.org/
License: https://www.geonames.org/
Gazetteer and postal code data for free.
https://iso639-3.sil.org/code_tables/download_tables/
License: https://iso639-3.sil.org/code_tables/download_tables/
Some of its users: https://iso639-3.sil.org/code_tables/639/data, https://polyglotclub.com/
ISO 639-3 tables. It assigns each language a code and is updated every year.
https://www.unicode.org/iso15924/codelists.html
License: https://www.unicode.org/copyright.html
Some of its users: http://www.unicode.org/iso15924/codelists.html
ISO 15924 lists. Codes for scripts.
https://www.unece.org/cefact/locode/welcome.html
License: https://www.unece.org/cefact/locode/locode_since1981.html
UN/LOCODE, an alternative to ISO 3166-2. It is updated twice a year.
http://www.nationalanthems.info/
License: http://www.nationalanthems.info/
National anthems.