I am not sure, but probably most if not all
a christmas tree
Well, I don't know about other countries, but when I lived in Okinawa, we used a fake Christmas tree.
in what year was the first documented use of a Christmas tree in lativa
Not all countries do. Many simply make shrines of Jesus and make fun of other counties that decorate a tree instead of making a shrine.
yes
palm tree
In Croatia, the Christmas tree is decorated on the eve of Christmas before mass.
Christmas lights
No. Christmas is a proper noun. Its use with other nouns (Christmas dinner, Christmas present, Christmas tree) is as a noun adjunct, not an adjective.
you put it on a string and hang it on the tree
Romanians use the fir tree.
Russians used the classic Christmas trees. They Might have differant Decotations and such... But it is still a plain Christmas tree.