Originally Posted by zeromusx
If I root and install the ROM will everything also be available in English only or will I still be able to use Dutch. Will I lose something?
That depends on whether the new ROM you're flashing contains a Dutch language pack. Rooting per se will not modify your data or your language. Also note that flashing can erase your internal memory data.(I have no experience with the Star, however I had a Nokia 3500c. Using the official Nokia app, I upgraded my firmware without any data loss. If you will be using the official Samsung app, you should be safe). That said, make it a point to backup your SMSes, contacts, calendars, notes etc.
Another question: If I upgrade to ICS official by Sony trough Sony Bridge on my Mac and ICS is installed on my phone, will I lose data and the root and ROM?
Will I lose root? Yes, you will most likely lose existing root permissions if you already are rooted.
Will I lose data? Unlikely, using Sony Bridge.
Will I lose ROM? Of course, that's the reason you're upgrading
to ICS in the first place, isn't it?
Have a look at the following resources and any other places you'll stumble across.
: CM 10