According to
this there is no language pack for the last release of jobroller 1.6.4 ( I believe it's 100% compatible with 1.6.3 and only few words added to jobroller 1.6.4)
Anyway, I am going to send to you the file of 1.6.4 ,you will need to translate some words yourself.
As I said above, Olinda includes few words, you can find them all in home page, like tabs, header ect . so simply CTRL+F in the .PO file and translate then save.
Cheers