Portrait of Catherine Chantal Marango
Founder & pedagogical design

Catherine Chantal Marango

More than fifteen years of in-person French teaching transformed into specialist software for demanding professional communication.

Founder

Catherine Chantal Marango taught general and specialised French in person for more than fifteen years, supporting learners with demanding academic, professional and personal objectives. She created Personal French Teacher AI to extend that pedagogical experience through private, structured software available without geographical or scheduling constraints.

“Technology creates its greatest value when it extends human expertise without compromising rigour.”

From professional French to sports environments

Personal French Teacher Sports AI applies the same pedagogical discipline to football, tennis, golf and grand racing. The agents train professional French communication through structured scenarios, deterministic evaluation, weakness tracking and progressive pressure. Their scope is linguistic and professional communication; they do not provide sports coaching, medical advice or performance prescriptions.

Quantum Excellium Core

The products are powered by Quantum Excellium Core (QEC), a local-first architecture designed around deterministic logic, local persistence, integrity controls and optional local generative components. The purchased version is intended for durable use under a Lifetime licence, without a mandatory recurring software subscription or mandatory paid AI API.

INPI · Quantum Excellium

Documented innovation & intellectual property

Quantum Excellium maintains five French patent applications under examination at INPI. For all five, INPI has notified authorisation to disclose and exploit the invention after the opinion of the Minister responsible for Defence.

5French patent applications / demandes françaises de brevet
5 / 5Defence-procedure authorisations / autorisations procédure Défense
INPIFrance

These are pending patent applications, not granted patents. The Defence-procedure authorisation is not a technical certification or commercial endorsement.