Here are a few options for a formal title, depending on the specific focus of your study:
Option 1 (Direct and Academic):
“A Novel Doctoral Framework for the Detection of Multilingual AI-Generated Misinformation”
Option 2 (Action-Oriented):
“Advancing the Detection of Multilingual AI Misinformation: A Doctoral Investigation”
Option 3 (Comprehensive):
“Development of Methodologies for Identifying Multilingual AI-Driven Disinformation: A PhD Study”
Recommendation:
Option 1 is the most standard and professional choice for academic papers or formal presentations.