fundamental interaction in other languages

• English
  

• Albanian
  

• Arabic
  

• Armenian
  

• Bulgarian
  

• Catalan
  

• Chinese
  

• Mandarin
  

• Czech
  

• Esperanto
  

• Finnish
  

• French
  

• Greek
  

• Hungarian
  

• Japanese
  

• Korean
  

• Lithuanian
  

• Persian
  

• Polish
  

• Portuguese
  

• Romanian
  

• Russian
  

• Serbo-Croatian
  

• Slovak
  

• Turkish
  

• Vietnamese