In Finland, Santa might also be known as Joulupukki! (This really means 'Christmas Goat' as it was traditional in Finland that there was a Yule Goat who was scary and asked people for presents - and certainly didn't give any out! Over time the goat became the gift giver and then Santa took over the gift giving duties but the name of the Christmas Goat was still retained in Finland!) Joulupukki rides with reindeer leaves gifts under the Christmas tree but if you have been naughty you could end up with a bag of coal!
In Finnish Happy/Merry Christmas is 'Hyvää Joulua'. Happy/Merry Christmas in lots more languages.