'The most' MOST OF THE family 'together' (niepotr) 'decorated' DECORATE THE Christmas tree. 'In' ON THE Christmas tree you can see sparkling chains and colourful trinkets.
In the evening, ON Christmas Eve people 'has' HAVE (people tutaj jest l. mnoga-HAVE) dinner and together sing Christmas carols. (People wish each other all the best). The most popular course is roastED fish, beetroot soup and 'herling' HERRING.
In THE morning on '24' (cos daty przekreciles_ popraw) December children 'gives' GIVE presents.
After THAT people spend TIME together 'time' (niepotr) on NICE conversation.