Bio-Broly, unlike the original Broly, is a more grotesque and mutated version of the Saiyan warrior, and he does have some ability to speak. However, his speech is more incoherent and primal compared to the original Broly. Bio-Broly is more of a mindless, rage-driven creature, but he does have moments where he expresses his anger

Broly… Bio...Broly… Destroy… Kakarot…

His voice is hoarse and distorted, reflecting his mutated form and the loss of the original Broly’s more coherent personality. His words would be driven by the same intense hatred, but with a more animalistic and uncontrollable tone