Go to the mysms translation tool and feel free to register for a new account. This allows you to have a better overview over your translations.
Select the mysms app you would like to translate and choose your preferred language.*
You are now ready to go. Check if there are open suggestions from other translators and vote for them or suggest a new translation.
* In case your language is not yet available in the mysms translation tool, This email address is being protected from spambots. You need JavaScript enabled to view it..