I managed to get the main WordPress interface localised in my language (create .mo file, place in wp-includes/languages, enable in wp-config.php).
However, I am at a loss to what to do for the themes.
I know that the default theme is not internationalised.
I use Green Marinee (http://www.alexking.org/software/wordpress/themes/blog/) that is internationalised (I can see the __() and _e() constructs).
However I do not know where to place the .mo file for the theme.
Where shall I put the .mo file for the theme? Is there a specific directory, or should it be merged (ugly) with the main .mo file?