A new study claims to prove that the human brain uses “articulation planning” to prepare speech.

These neurons represented the specific order and structure of articulatory events before utterance and reflected the segmentation of phonetic sequences into distinct syllables. They also accurately predicted the phonetic, syllabic and morphological components of upcoming words and showed a temporally ordered dynamic. Collectively, we show how these mixtures of cells are broadly organized along the cortical column and how their activity patterns transition from articulation planning to production.

In other words, the human brain data pipeline for speech has a distinct development phase of neurons that probably could be audited or compromised.