Hi @Lazar_Stosic,
Ah, of course, that feature wasn’t included as of OJS 3.0.2. The best solution would be to upgrade, which will get you both the custom navigation menu feature and the complete translation, but if that’s not possible, you can search the English-language language files for each locale key…
$ fgrep -l common.homepageNavigationLabel `find . -name \*.xml | grep en_US`
./lib/pkp/locale/en_US/common.xml
…and then edit the equivalent file in your translation. These may not all be in the same file.
Regards,
Alec Smecher
Public Knowledge Project Team