Change the language

I was just wondering if there was a manual way to change the language in this plugin? I noticed it has a “wpecr-nl_NL” file in the languages folder, so i expect for it to be possible to have the plugin in dutch. However, for support purposes i’m using the english language in wordpress itself.

Furthermore, is it possible to remove some entries from the register from? For instance, country and company aren’t needed in my aplication. Or would i have to hack the php files for that?