en_tn/luk/02/13.md

a large number of the heavenly army

The word "army" here could refer to a literal army, or it could be a metaphor for an organized group. (See: rc://en/ta/man/translate/figs-metaphor)

praising God

This could be translated as "They were praising God."

Glory to God in the highest

Possible meanings are 1) "Give honor to God in the highest place" or 2) "Give the highest honor to God."

may there be peace on earth among people with whom he is pleased

"may those people on earth with whom God is pleased have peace"