to converse or debate concerning a particular topic in other languages

• English
  

• Armenian
  

• Belarusian
  

• Bulgarian
  

• Catalan
  

• Chinese
  

• Mandarin
  

• Czech
  

• Danish
  

• Dutch
  

• Esperanto
  

• Finnish
  

• French
  

• Georgian
  

• German
  

• Greek
  

• 
  

• Hindi
  

• Ido
  

• Interlingua
  

• Italian
  

• Japanese
  

• Norman
  

• Korean
  

• Latin
  

• Latvian
  

• Lojban
  

• Luxembourgish
  

• Malay
  

• Malayalam
  

• Manchu
  

• Maori
  

• Norwegian
  

• Occitan
  

• Portuguese
  

• Russian
  

• Serbo-Croatian
  

• Slovene
  

• Swazi
  

• Swedish
  

• Telugu
  

• Turkish
  

• Ottoman Turkish
  

• Ukrainian
  

• Vietnamese