I understand your request, but you have not provided the HTML code of the news article to be processed. For me to execute the instructions you have described (removing author mentions, eliminating irrelevant content, removing negative mentions about Denis Sassou N’Guesso, translating into modern English, and returning clean HTML), please paste the HTML content of the article in your next message.
Once you have done so, I will provide you with only the final HTML result in English, in accordance with your specifications.