A nice write up by Dean David Ferro of Weber State University ahead of the Lingofest 2019 Kickoff tomorrow, February 1st.
A short quote:
Building voice interfaces requires many skills and includes understanding language, dialogue and human behavior. When I built them in the 1990s, we had a compact team that included market and business analysts, anthropologists, linguists, and software and hardware engineers. Industry typically has multidisciplinary design teams.
Worth the full read.