Tho whom is searching a way to change PL language interface or coin type or date format check my post here:

http://www.projectlibre.org/discussion/date-format-0

I kindly ask for an answer to my previous questions: 

  >>besides changing the default interface language what else can I set with the projectlibre.conf file?

  >>Is it possible to customize the date format + interface language + coin value?

  >>Are there other tweaks that can be applied with the *conf file?