I've created two dictionaries.
English-Polish
https://www.sendspace.com/file/ud52xu
German-Polish
https://www.sendspace.com/file/ud52xu
I used Wiktionary database to create them, so big thanks to all people working on this project.
English dictionary has 55k unique definitions and german 24k.
Right now I'm working on Russian - Polish dictionary. There is no problem with working on Cyrillic alphabet.
I wrote, some script, that parse wiktionary database, so after making small changes it will be possible to prepare dictionaries from other wiki words databases (English, German, etc...). I'm very eager to try it , so please give me hint which language dictionary should I create.
One thing you have to remember after installing them.
Turn of synchronisation, because updates will replace your dictionaries with standard ones.
Script code is not going publicyet , because is not ready in 100%.
Enjoy reading.