Translation CK is a minimalistic tool to help you filling your .INI language file. The software will look in all the PHP files of your component to find the JText calls and compare them to the actuel ini file. If the string is missing in the file it will add it automatically and you can directly download the modified INI file to put it in your own component.
Then you will just need to add the correct translations.
I developped this little tool for my own needs, it is only for developpers who want to gain some time for their translations.