You have this confused.
Every hero has 2 main ultimate lines(some skins have special ones), one that is intense or fierce and is often in another language, another that is more informative. For example, D.va yells “Nerf this” as her fierce one and “Activating self destruct sequence” as the informative one.
Enemies hear the fierce one, allies hear the informative one. The player using the ultimate however, hear the fierce one. The exception to that rule is supports, who hear the informative, or “allies” voice line.
Symmetra has her fierce one for enemies, which is the Hindi one, and for informative one for allies. Allies have always heard “Reality bends to my will”, which is her allied voice line.
The Brigitte change was to make the Brigitte player hear the same informative line as her allies, like the other supports do, and not the intense line for her enemies, which heroes of other roles hear when they use their ultimate.
It is worth noting that Reinhardt, Torbjorn and Bastion do not have the “informative” voice line, so their allies do not hear anything.