Rayman 2 includes a "Raymanian" dub

Yooka-Laylee

Panzer Dragoon series uses the fictional "Panzerese" language--Saga reverts to japanese VA outside of the big fmvs but Orta is fully voiced in the fictional language

FFX and Al Bhed? If that doesn't qualify as gibberish, then probably the Cactuar language in FFX-2 would!

rayman origins and legends use pig latin, if that means anything

Biomutant

Okami

hmm wondering if constructed languages count as gibberish, i guess al bhed kind of does because it's literally just a cypher

Pikmin 2 and Pikmin 3

oh yeah and all the Luigi’s Mansion games + the Mario and Luigi series

Plants Vs. Zombies for Crazy Dave

Undertale also I think

i treasure the way voices are done in moon with all of my heart