Just a bit of information for you: in case you have some queries about the WTS, you can find short and simple Questions&Answers about it here!
In case you're looking for a specific translator, please see the list of available translators on BabelZilla.
When you select the desired one, you can send him/her a P.M. or an e-mail (if and when public).
You may also insert a new Topic in the Help Section, in order to ask for specific translations, to write a general request about missing translations, etc.
Let me quote here from Goofyâ€™s earlier welcome post:
------------ two extra side notes
1. As this extension is closely linked to a commercial product, would you please tell us if it will remain a free and open source product. We have nothing against the idea of making profit with extensions, but we wish the developers to explain their intention, so that volunteer translators can choose to provide their work or not, each of them being free to decide
2. The version for Tunderbird and the one for Firefox may have a good number of strings in common, would you please tell us which files (if any) could be uploaded directly once they are translated for one of the 2 apps?