Polish translation for jhipster.

Polish translation, 
I tried to translate every key. 
I left some related with jvm naming, just because they sound stupid translated to Polish. 
I tested most of the views. The only problem I've seen in the layout in the Thread dupm view, but it is a general problem. 
For future translations I think first should be placed the English version and it can be fixed with pl.
My general questions is if Angular translate should not show default key when the translation is not available for given language. 
Does it work like that?