Marco Silva has denied Watford are specifically targeting English players despite a significant change in the profile of their squad.
The club-record signing of the £18.5million Andre Gray from Burnley on Wednesday takes the Hornets' number of new English players this summer to four.
Before Gray, Will Hughes, Nathaniel Chalobah and Tom Cleverley joined the club permanently, and fellow new signing and Austrian goalkeeper Daniel Bachmann counts as home-grown under Premier League rules following his spell at Stoke.
It is also understood that both Everton winger Aaron Lennon and Arsenal defender Kieran Gibbs remain transfer targets, meaning that by the conclusion of the transfer window English players could account for five or more of their starting XI.