what are the names of these christmas song that's in latin?

[EmperorNero]

one in, it's part latin and part english. "gloorriiaaa, in excelsus deo..sing to him...something something"

- another has the word "doremus" in it.

 

[Isla]

Adeste Fideles?

It's O Come All Ye Faithful in Latin.

I like.

 

[palad]

Doremus would be part of adoremus, as in

'Venite adoremus, dominum.' -- 'Oh come let us adore him, Christ, the Lord.' from Oh come all ye faithful.

The other is 'In excelsis Deo' from 'Angels we have heard on high'.