If this was directed towards me, the first part of your question would indeed be yes. It is open to ALL PCLinuxOS users.
There is a Dutch translation. Once logged into the system select OPTIONS --> DISPLAY PREFERENCES --> LANGUAGE --> DUTCH
It would be great if you would like to ask and see if there is an interest.
Thanks YouCanToo
Thanks for your fast answer....
I didn't find it first time (a mail server with as many options as you want)...
But it didn't work

=> I tried selecting
Dutch, and pressing "Submit" at the bottom; but nothing changed. Then I pressed <F5>, no changes. Then <Ctrl><F5> (complete reload), no change..... so I thought there was maybe something wrong with Dutch...
=> selected
French - same ways of testing, no change (everything stayed in English); even tried logging out and logging in again - no translations applied
Maybe I missed something obvious (like in my previous question), or there's something not working on the server... (maybe other people who tried changing the language?)
=> sorry for the trouble and work I'm creating..... but
thanks in advance 
(if it's not possible [at the moment],
just say 
)