Why is the dialog absent on the English version of this trailer?

The trailer mentioned on this thread is from the Japanese version in which has a man narrating「時を越え、知恵と勇気で世界を救う」("Transcend through time, both courage & wisdom will save the world") while one from Nintendo UK is dead silent despite it being the same trailer. I mean, they could've at least had someone to localize it when re-releasing it to Western players. I've just noticed this subtle difference.