Download PoEdit : http://www.poedit.net/download.php
Open : "mobilerevenu.po"
Update : Catalogue > Configuration (language, country, translator...)
Save ur file as xx_YY.po
cf. http://codex.wordpress.org/WordPress_in_Your_Language

Translate each sentense & save ur file

upload xx_YY.po and xx_YY.mo to this directory

Please, if u add a new language, send us ur files in order to add them on the next download for all