Using Wikipedia to translate concepts

Wikipedia is organized by topic, so switching languages while reading about a topic takes you to the same page in the other language (if it exists).

1. Example:
   ENGLISH: Disambiguation
   French: Homonymie
   Spanish: Desambiguación
2. Granddictionnaire.com is solid if incomplete
3. Word Reference comprehensive in English Español Français Italiano Português
   Also includes conjugation, images!
   Example: output:
   in Spanish in French in Italian in context images Listen: US - UK
4. Altavista.com can even be used with two windows, one for each direction
   example: one for french to english, the other english to french