UPDATE on the massive Twitter data breach reported last week. The breach of nearly 1.4 million French Twitter users' data is now being investigated by independent experts in France who will pass on their findings to CNIL, France's data protection authority.
CNIL has the mandate to investigate and issue massive fines or other sanctions on companies which violate the country's strict data privacy laws. https://www.cnil.fr/en/investigation-powers-cnil