I remember someone saying that language is the software to the hardware of our brains. Something to that effect. Does anyone know who that was?
I can't point you to an exact name, but what you are referring to is the computational theory of the mind: The idea that the brain is a computer, and mental states and entities (language, thoughts, beliefs, etc...) are software installed on this device. The computational theory of mind is itself a type of functionalist theory of the mind.
The way you phrased the statement, the closest philosopher to that position is probably Jerry Fodor, with his language of thought (LOT) theory. He believes that there is a language of thought hardwired into the brain, the way assembly language is hardwired into a specific processor, and that mental processes constitute computations using this language of thought.
Other notable notable functionalists who argue for the mind as a computer are Daniel Dennett, Douglas Hofstadter, and at one point in his career, Hilary Putnam.
Because you weren't exactly sure what the quote was, in addition to the answer already provided here are a few possibilities with varying degrees of similarity to your given sentence:
The mind as the software of the brain.
Language is the software that activates the mind, but it doesn't come pre-installed.
The human brain consists of a neural system as hardware and a language system as software.
The brain as hardware, culture as software.