Translating strings can be a slow and tedious process and completing them all at the same time is not likely. With two files you can choose to translate the tools during one development cycle and the backend during the next one, while keeping some overview over your progress at the same time.
Regards, Aleksander
---------------------------(end of broadcast)--------------------------- TIP 5: Have you checked our extensive FAQ?
http://www.postgresql.org/docs/faqs/FAQ.html