I've created a simple script to help manage your activeCollab-translations:

http://public.develop.fyens.dk/activecollab.zip

At the top of the "localizer.php" script, you can edit the names of two language folders: one is your template, e.g. the language you're translating from - the other is the language you're translating to.

The script will display every string's identifier, it's original string (from the template), and your translation - it'll also display inline comments from the source files, and when you press save, the strings will be written back to the files, so remember to give write permissions to the new language folder. Comments, indentation, etc. in the target translation files is fully preserved - only your translated strings are replaced on save.

To create a new translation, you should start by copying the original "en_us" folder, and renaming it.

This archive also contains a danish translation.

The script is configured for use with standard iso-8859-1 charset - there is a charset setting, so you can switch to utf-8, but I haven't tested this extensively, you may need to do some minor tweaks to get this to work...

(This is based on activeCollab version 0.7.1. - tested with PHP5 and IE, but might/should work with others.)