I think I have the most so far
England, USA, Canada, Iceland, France, Andorra, Espana, Gibraltar, Portugal, Italia, Monaco, San Marino, Vatican City, Switzerland, Luxembourg, Holland, Belgique-Belgie, Deutschland, Osterreich, Hungary, Slovenia, Hrvatska, Czech Republic, Slovakia, Tunisie, Maroc, Tanzania, United Arab Emirates, Saudi Arabia, Cuba, Mexico, Ireland, Scotland, Wales (try telling those two they're not countries, OK?), errrrrrr... is that it? 34 then. But most of you will debate that a few of my countries are countries. Me, I give them all my props.
1 Andora
2 Austria
3 Belgium
4 Canada
5 Czech Republic
6 France
7 Germany
8 Holland
9 Hungary
10 Iceland
11 Italy
12 Luxembourg
13 Monaco
14 San Marino
15 Spain
16 Switzerland
17 Ukraine
18 USA
19 Aruba
20 Curacao (if these 2 count or call them Netherlands Antilles)
Next week:
21 Poland
And in 2 months
22 Sweden
https://www.cia.gov/library/publications/the-world-factbook/
UK, France, Belgium, Netherlands, Germany, Spain, Gibraltar, Majorca, Italy, Greece, Turkey, Norway, Sweden, Denmark, Finland, Jersey, Guernsey, Morocco, Gambia, Sri Lanka, USA
So that's... *counts on fingers* 21...