Language/Multiple-languages/Culture/Internet-resources-for-learning-specific-languages

Free resources for learning specific languages. Those mentioned in Language/Multiple-languages/Culture/Internet-resources-for-polyglots and its linked pages (course, dictionary, listening, etc.) are not to be listed again here.

Chinese

https://hanzigraph.com/

Graph of words. It is open-source.

https://freehkfonts.opensource.hk/

Standard Hong Kong Chinese font. It is open-source.

https://www.relativescalc.com/

Like a calculator, it helps to understand the forms of address of relatives.

English

https://www.vocabulary.com/

A site for practising words.

http://latinandgreekrootwords.com/

Word roots.

https://www.elevateapp.com/

It helps you to pass through the prolonged intermediate phase.

https://www.thepunctuationguide.com/

Guide to punctuation, for English only.

https://wikidiff.com/

See the differences between two words.

https://www.manythings.org/

Many things, including many articles and several books with audio. The pages are not designed well, but the contents are not that bad.

https://sourceforge.net/projects/toeflpractice/

A program for practising TOFEL speaking skills. It is open-source.

https://visuwords.com/

Excellent for seeing the relations between words. But there is only one part of speech for each word, which is a big flaw.

https://www.phrases.org.uk/

This site has a lot of phrases with their origins.

https://english-number.com/number-test

For practising numbers.

https://knowyourmeme.com/

All about memes.

https://rhymezone.com/

For composing poets. There are other functions.

French

https://github.com/andrewmcc/french-verbs

Conjucation practice.

http://www.litteratureaudio.com/

Downloadable audiobooks.

https://grammalecte.net/

Grammar checker. It is open-source.

German

https://github.com/Sw24Softwares/StarkeVerben/

Strong verbs. It is open-source.

Icelandic

https://ylhyra.is/

Texts and flashcards. It is open-source.

Interlingue

https://addons.mozilla.org/en-US/firefox/addon/interlingue-spell-checker/

Spell checker.

Japanese

https://github.com/Anupya/JapaneseTab

Learn vocabulary with Chrome tabs. It is open-source.

https://github.com/blastrock/kakugo/

Kana, Kanji and vocabulary on Android. It is open-source.

http://suiren.io/

Learn related words in chains.

https://minosvasilias.github.io/kanjigrid/

Grid of Kanji. It is open-source.

https://sethclydesdale.github.io/genki-study-resources/lessons-3rd/

Genki Exercises. It is open-source.

https://waniconjugation.herokuapp.com/

Conjunction. It is open-source.

http://www.japanesenumberconverter.com/

Reading of number.

http://www.gavo.t.u-tokyo.ac.jp/ojad/

Accent dictionary, including vocabulary in textbooks.

http://accent.u-biq.org/

Lists of pitch accents.

http://yourei.jp/

Example sentences.

https://addons.mozilla.org/en-US/firefox/addon/furiganaize

Add-on for adding furigana for Firefox. It is open-source.

http://fonts.jp/hanazono/

Font with the largest coverage of characters in Japanese standard. It is open-source.

https://github.com/ripose-jp/Memento

Translate subtitle from mpv and create Anki flashcards. It is open-source.

https://game2text.com/

Capture text from visual novels and create Anki flashcards. It is open-source.

https://legendsoflocalization.com/

A serious look at localisation from Japanese and to Japanese.

Korean

https://mirinae.io/

Sentence analyser.

Literary Chinese

http://www.kangxizidian.com/

Kangxi dictionary.

New Zealand Sign Language

http://www.nzslsignninja.co.nz/

A game.

Polish

https://addons.mozilla.org/en-US/firefox/addon/polish-spellchecker-dictionary/

Spellchecker.

Vietnamese

http://nomfoundation.org/

Material around Hán-Nôm including font.

https://www.soccer-cjkv.com/hn/font.html

Hán-Nôm fonts. The first four are maintained by the group itself.