Authors of the dictionaries
It usually begins by an email saying "I have added some words to your dictionary, can I send you an update?" or "You don't have this language yet, but I have a small list on Excel that you could publish" or else "How could I start a new dictionary from scratch?". This is how a dictionary is born, this is how it grows and becomes more and more useful and reliable.
Some of the authors are members of our forum, but some others only keep a contact by email with Freelang. Some of them contributed just once, and others have been contributing for years, with regular updates.