General

• Conlangs
• Etymology
• /r/LanguageLearning
• Linguistics
• Logophilia
• Translator
• /r/etymologymaps
  

Individual languages

• /r/Chinese
• /r/English
• /r/French
• /r/German
• /r/Japanese
• /r/Spanish
• /r/Swahili
• /r/Swedish
• /r/Romanian
• /r/Russian
• /r/Catalan
• /r/Polish
• /r/Ukrainian
• /r/Serbian
• /r/Greek
• /r/Turkish
• /r/Dutch
• /r/Portuguese
• /r/Korean
• /r/Learn_Arabic
• /r/BengaliLanguage
• /r/Telugu
• /r/Vietnamese
• /r/Urdu
• /r/Farsi
• /r/Kannada
• /r/Sundanese
• /r/Tagalog
• /r/Kurdish
• /r/Latin
• /r/Sanskrit
• /r/AncientGreek

etc. List more later.

Books