The French midfielder of Moroccan origin said his aspiration to achieve new challenges made him join the Hornets from Nantes
Imran Louza has promised to give Watford "everything" having joined the Premier League side from Ligue 1 outfit Nantes.
The Hornets announced the signing of the 22-year-old for an undisclosed fee in a five-year deal that will keep him at Vicarage Road until 2026.
The midfielder will continue his development in Hertfordshire under manager Xisco Munoz and will compete with the likes of Tom Cleverley, Nathaniel Chalobah, Ken Sema, Dan Gosling, Will Hughes, Tom Dele-Bashiru and Daniel Phillips for first-team action.