These are some of the best free online dictionaries for the languages mentioned below:
Multilingual dictionary Catalan · Spanish · English · French · German.
Online diccionary English⬄German.
Online English⬄German dictionary by the Technical University of Chemnitz.
Catalan⬄German online dictionary under GNU public license.
Language data base with neologisms in Catalan, Spanish, French, German, English and Latin.
Formerly known as Eurodicautom, it is the EU's terminology database.
Online Catalan-Valencian-Balearic Dictionary by A. M. Alcover y F. de B. Moll.
A Standard Dictionary of the Catalan Language.
Online Catalan Dictionary.
Dictionary of the Royal Spanish Academy.
Online dictionary of American English.
Digital Dictionary of the German Language in the 20th Century.
Online dictionary of the German language.
French⬄English online dictionary.
Luxembourguish⬄German online dictionary.
Chinese⬄German dictionary.
Multilingual verbs conjugator.
Catalan verbs conjugations.
It contains the updated official German spelling rules.
Here you'll find a handy list with 17 German spelling rules .