I've been able to localize a new side name using the "locals" technique under:

Levels
...Map_ID
......Side_Name

By adding "SetTeamName (1, "Side_Name")" in the LUA.
But what about the full side naming under:

Common
...Sides
......Side_Name
.........Firstnames
.........Lastnames
.........Hero
.........Longnames
.........Name
.........Name_m

The SetTeamName function doesn't appear to be able to call out the info under Common.Sides. I also tried putting all that info under:

Level
...Map_ID
......Sides
.........Side_Name
............Etc, etc, etc

But that didn't work either.

Does anyone know of a LUA function to call out the info under Common.Sides? Or a way to include the full side naming under Level.Map_ID?