If you have sucessfully translated a module for moregoupware, which means you have added a new file for example "calendar.it.lang" (italian) to the lang directory of a module (calendar). You can check out your translation by following the steps below:
run following SQL against your moregroupware database:
INSERT INTO `mgw_languages` (`langcode`, `description`, `active`, `lu_user`, `lu_date`) VALUES ('it', 'Italian', '1', 'admin', NOW())
open moregroupware and go to "settings" and "personal settings"
change your language to the one you just created (here italian)
go to your translated module and check the results