Complex sentence: The game says that the Ood have no vocal cords The tube was originally connecting their external brains to their body, but to use the creatures, far future humans would amputate the brain and instead fix the translator sphere where the brain used to be.
Split into simpler sentences: The game says that the Ood have no vocal cords The sphere is connected to the Ood via a tube that was originally connecting their external brains to their body. Humans in the future would physically alter their brains and fix the translator sphere where the brain used to be.