It's easy to translate Mail2Voice in your language : it is to translate a single file.
Here, step by step, how to proceed.
1/ Get an original language file.
2/ Rename the language file.
Rename the file in "yourlanguage.lng".
Open the file with a text editor (Notepad++ is very good for that).
If this is not the case, Notepad++ allows easy conversion: menu "Encoding" and "Convert in UTF-8 without BOM".
Place your file in the directory 'locales' of Mail2Voice. Start Mail2Voice, you can choose your translation from the settings section.
Come on the forums to share your translation.