PL Says:
"Each club’s squad must contain no more than 17 players who do not fulfil the "Home Grown Player" (HGP) criteria. The rest of the squad, up to a total of 25 players, must be "Home Grown"."
So in reality we can have a max of 17 non-homegrown. The number of home grown is less important.
Also
PL says:
"A club’s Under-21 players are not included on the 25-man squad lists. These players are also eligible to play in the Premier League. " U21 is defined as born after 1 Jan 2004.
So Talbi, Diarra and Sadiki dont count towards the 17
Anyway we currently have 14 non home grown in the squad list - and we only have 23 in total in the senior squad list. * is home grown
Adingra, Simon
Alderete Fernandez, Omar Federico
Alese, Ajibola Joshua Odunayo*
Ballard, Daniel George*
Brobbey, Brian Ebenezer Adjai
Cirkin, Dennis*
Geertruida, Lutsharel Emiliano
Hjelde, Leo Fuhr
Hume, Trai
Isidor, Wilson
Le Fee, Enzo Jérémy
Mandava, Reinildo Isnard
Masuaku Kawela, Fuka-Arthur
Moore, Simon William*
Mukiele Mulere, Nordi
Mundle, Romaine Lee*
Neil, Daniel James*
Nna Noukeu, Blondy Rudolph*
O'Nien, Luke Terry*
Patterson, Anthony William*
Roefs, Robin Gerardus Petrus
Traore, Bertrand Isidore
Xhaka, Granit