DefaultTranslation

How can I set the default translation for SquirrelMail?

Edit data/default_pref and add this line

language=en_EN

But replace the 'en_EN' with the 4-letter code for the language you want (for example, de_DE = Deutsch, es_ES = Spanish). To see the full list of languages you installed in your SquirrelMail, look at the list of directory names under the SquirrelMail 'locale' directory.