Many modules are not translated and do not show the language that you have set your installation for.
I'm learning how to deal with the .po files. I can't see any change after uploading a new translated [nn].po file into the translation directory of the module.
You'd think that just ftp uploading a .po file should do the trick. But somehow it doesn't. Do I need to import something?
I do not understand how the the instructions at Site building > Translate interface > Import apply to uploading any contributed module translations.
Of course it's an open question if it's just me being stupid or the module not handling this correctly. And that is what's frustrating.
According to the drupal forum references, this should already have been imported, or i need to import it. Funny though, if the file is on the site and I import the file throguh the import interface, there will be two versions that are probably not connected to each other.
It's also good to know already that any changes to an existing .po file have no on-site effect, until the localisation (l18n) module is added (,understood and made functional). All this sounds like thin ice - better make a full backup first.
WIP
references: http://drupal.org/node/344941 Why my changes in .po translation file not showing? (this is about a changed .po file)
http://drupal.org/node/14206 After translating a Module, how to enable the translation? (never mind - 5 years ago)
http://drupal.org/node/453844 How to add translation to a module ? (refers to a handbook section)
http://drupal.org/node/376307 How to install a modul translation