Speaking too officially means that the speaker speaks and behaves too solemnly and seriously. Or it means that the answer is a specious, grandiose, irrelevant and roundabout formula, which is of no practical use.
Officially, there are many interpretations. It is generally interpreted as the government. In ancient times, it refers to the establishment of an official. It also refers to the party that controls the power, such as the "official" of the company, and the "official website" is the official website.
The official refers to the organizer of a social event, or the promotion operator of a commercial product, that is, the sponsor, which is a group organization or enterprise directly facing consumers.