Thanks. I think you can also recommend to make the entire translation before importing the new language file. If you have some errors (mispelled words for example) or if your translation is not complete, you will have to delete the new language you added, and re-import the corrected file.

For those who are interested, I am working in a french translation (public and admin parts). It will be available for the end of the week (add me to your friends to know when it will be available)