[SM-I18N] Problems to suse my translation

[Japhet S. <ku...@ju...>]

I have started to localise Squirrelmail to Kiswahili language, I'm using version 4.2, I
have  translated the .po file and created .mo file, I also have added my new language.
But when i set to use this new language, it works with some functions and then returns
to english version. What can i do to keep it in my translation all the time?