pl.po. This file is generated in the "po" directory of the source tree during
the compilation.
+There are basically two source trees you can start to work with - trunk
+(development version) and branch (stable version). Unless the development
+version is shortly before release it is better idea to start your translating
+work on the stable version. If you have no idea how to get those trees you
+can follow http://www.lyx.org/HowToUseSVN page.
+
2) HOW DO I EDIT PO FILES?