Translation:A good Esperanto speaker has large dictionaries.
Vortaro comes from the word for word (vorto) and the suffix -aro, meaning a a collection, so vortaro is literally "a collection of words". A good Esperantis needs that as well!
This is so indisputable. Whenever I learn a new word in Esperanto, the first thing that I do is go to http://www.esperanto-chicago.org/rootsglossary.htm or some other root word glossary. From there, I use Control + F (or Command + F on my Macs) for the individual roots of the new word that I have learned. This allows me to track what the roots within the word mean and how they change the meaning of the word.
I use the text Esperanto English dictionary from http://www.denisowski.org/Esperanto/espdic_readme.htm. Wrote a Python script to convert it to an sqlite db and search it. Thinking about turning it into a web interface so you can click words in the definition and see their translation. This is a pretty good dictionary.
This looks pretty useful. A web interface would definitely make an excellent addition to compliment the Python script. ;)
I also thought "large vocabularies" was correct. What would have been the correct way to say this?
It seems to strict if i put a little "a" in between has and large and its marked wrong
"A" isn't allowed because "large dictionaries" is plural. By adding the "a", you're indicating that it's singular, which is incorrect. In this case, it's not the Duolingo course being strict, rather, it is the rules of English that are strict on this matter.