There seems to be a lot of things that could be improved in the Dutch language. Some examples are:

• Correct conjugations 
• Correct spelling 
  • de-activeren -> deactiveren
  • Email -> E-mail
  • Word combination written without spaces, unlike English, in Dutch words have to be combined (e.g. bouw opdrachten -> bouwopdrachten, systeem eigenschappen -> systeemeigenschappen)
• Better word choices (It also seems that previous translations were done by a Belgian, using words Dutch people would not use. In this case,  I tried to use words that both Belgians and Dutch would understand.)
  • Vooraleer -> Voordat (Dutch people usually don't use 'vooraleer')
  • Bewaar -> Opslaan (English: Save)
  • Paswoord -> Wachtwoord
• Correcting words that do not exist
  • directorie -> map (English: directory)
  • authentificatie -> autenticatie