Hi blessi,
Sorry to hear you’re having issues with the plugin.
Unfortunately, translation isn’t really our specialty so I’m not sure if I can help directly, this topic has been discussed in a previous thread though: https://wordpress.org/support/topic/translations-broken?replies=2
I think you might need to put the mo- and po- files directly in the lang folder and make sure they are named properly for your localization. I believe the folder ru_Ru is for russian translations, for German I believe the wordpress locale is de_DE.
We recommend this link http://premium.wpmudev.org/blog/how-to-translate-a-wordpress-plugin/ to get started working with translations.
Hope that helps a bit!
I tried exactly the same.
You just have to place your translation in the folder called lang and the files should be named like this:
- EWD_FEUP-de_DE.po
- EWD_FEUP-de_DE.mo
This is how it worked for me.