The group, led by Raquel Alatorre Correa, were found guilty of drug trafficking, money laundering and participating in organized crime, Judge Edgard Altamirano said Wednesday.
Prosecutors asked for the maximum 30-year prison terms for the trafficants.
The Mexicans were arrested in August in Nicaragua while posing as Televisa reporters.
The suspects were trying to smuggle $9.2 million from Mexico to Costa Rica, prosecutors allege.
The suspects were traveling in six vans bearing logos of the Mexican media company and had letters of accreditation allegedly signed by vice president for national reporting Amador Narcia, witnesses told prosecutors.(efe)