A member of the Football Association's commission into improving the national team's fortunes, Hoddle has floated the idea of establishing a quota system in the Premier League.
England Under-21s boss Southgate has also called for a cap on foreign talent, with a particularl focus on the Football League.
However, Daniel Geey, a solicitor and sports lawyer at Field Fisher Waterhouse, has suggested European law would make such rules hard to implement.
"I think that would be extremely tricky," Geey told talkSPORT.
"We all remember a few years back when Sepp Blatter was talking about a 6+5 rule, which was effectively six national, i.e. English, players starting in the 11.
"When UEFA were doing their homegrown player rule, they spoke to the European Commission, who are the legal lawmakers in effect, and said 'can we do this homegrown player rule?'
"Can they implement strict quotas? Almost certainly not because that would be a direct discrimination on the grounds of nationality."