You could extend the study further to see if people had a predilection for openings for countries that they liked or whether they avoided certain openings because they do not like a particular country.
Opennings and countries

Yes, I have thought on it also. eg, bolivarians of South America might avoid the Ruy Lopez from his repertory.

Myself I began to play the Ruy-Lopez after reading some Fisher games in his famous book :), but I must recognize, even I have played the french for some years, when I was living in France something in my brain forced me to buy Moshkalenko´s book and go in dip in its understanding .
Anyway I think hard players couldn´t be sugested by this, but I am sure there sholud be some kind of correlation in players with my rating or below (specialy in the case of opennings that players avoid).

If the name of the opening is your basis for playing or not playing it, YOU'RE AN IDIOT!
Just because a group of French people in 1834 played a correspondence game against the Brits using 1...e6 against 1.e4 does not mean that all French people should play 1...e6.
Play an opening because it fits your style, not because of it's name. If the Sokolsky were renamed to the Diarreah Attack, the Petroff was renamed the Afganistanian Defense (despite the fact that those death-deserving scumbags attacked our country on September 11th, 2001), and the Tartakower Defense was renamed the Barbie Girl Defense, I'd still play all 3 because what matters to me is the position on the board, not some stupid name!

I just do not understand practicaly any openning. Players with 1500 or so just play for fun without analysis, and brain is an organ that is influenced by other things while you are doing something.
I don´t think to call idiot (shouting) a keen who is proudly playing this game gives any answer to the question.

What seems like a politeness is to play an opening named after a country when you are playing someone from that country, as Bronstein used to do.

What if you go to a parck and you try to hit as your favourite player of the NY Mets?
This would be just as stupid! If I were a baseball player, which I'm not, I should not be trying to mimic David Wright! I would have my own stance. I would probably not hit third as when I was younger, had I taken up baseball, my speed would have been better than my power, so I'd probably have hit 1st or 7th, not 3rd. I would probably have played 2nd base (the position you typically put the player with the weakest arm at), not 3rd base, etc etc.
I would consider David Wright a great role model, but I would not just try to go out there and mimic David Wright, just like how I wouldn't base what opening I play on the name on the opening!

I'm assuming that the country doesn't have too much of an impact on the openings they play. For example, I live in the USA, but I haven't seen too many players use this:
Well, I know most of the chess history began when your country was growing and not interested in this game, so I apologize if it touch some sensibility. This is also true for many other countries of the world.
I think nowadays you are considered nice blitz players (I will like a lot to play in this parck of the movie ), and growing as a team in chess.
well sure it does (give an answer). You may not like the answer, but it gives one:
the question:
Do you think players use to have predilection to some opennings whose name has any connection with his country?
his answer:
"if so, they are an idiot".
While a little on the blunt side as a reply, it has merits; who cares what the name of it is? Play the correct moves for the position. Yes, some people probably are affected by the names if they even know them. MY answer is that anyone who knows the actual name of an opening knows enough to play, or not play, that opening if it suits their board/style/whatever. And the casual person who does not know m(any) openings who might be distracted by the names ... makes no sense. Either the person has studied openings or has not; who knows the names of 50 openings but not the moves; who would do that?

What if you go to a parck and you try to hit as your favourite player of the NY Mets?
This would be just as stupid! If I were a baseball player, which I'm not, I should not be trying to mimic David Wright! I would have my own stance. I would probably not hit third as when I was younger, had I taken up baseball, my speed would have been better than my power, so I'd probably have hit 1st or 7th, not 3rd. I would probably have played 2nd base (the position you typically put the player with the weakest arm at), not 3rd base, etc etc.
I would consider David Wright a great role model, but I would not just try to go out there and mimic David Wright, just like how I wouldn't base what opening I play on the name on the opening!
Myself I have been a tennis player when I was young. I couldn´t have tried to play as my favourite player Pete Sampras, because I have not a good service, I am not good at net and I play my bakhand with two hands. But some years ago I returned to play for fun (after 10 years stopped) and I tried to do the backhand with one hand as my idol Roger Federer.
I took it a bit seriously to play some tournaments and my teacher just forced me to return to play as I had learned being a child .

What seems like a politeness is to play an opening named after a country when you are playing someone from that country, as Bronstein used to do.
That was just to make his oponnent nervous I suposse. But it is also an option in the second case that repac3161 mentioned.

Every time when I play a blitz game as Black, and my opponent plays 1.e4 and when I see that the opponent is from France - I play only 1. ... e6 then

What if you go to a parck and you try to hit as your favourite player of the NY Mets?
This would be just as stupid! If I were a baseball player, which I'm not, I should not be trying to mimic David Wright! I would have my own stance. I would probably not hit third as when I was younger, had I taken up baseball, my speed would have been better than my power, so I'd probably have hit 1st or 7th, not 3rd. I would probably have played 2nd base (the position you typically put the player with the weakest arm at), not 3rd base, etc etc.
I would consider David Wright a great role model, but I would not just try to go out there and mimic David Wright, just like how I wouldn't base what opening I play on the name on the opening!
This is why i caught, and then played first. No speed...

I'm assuming that the country doesn't have too much of an impact on the openings they play. For example, I live in the USA, but I haven't seen too many players use this:
Well, I know most of the chess history began when your country was growing and not interested in this game, so I apologize if it touch some sensibility. Also true for Africans and also many countries.
I think nowadays you are considered nice blitz players (I will like a lot to play in this parck of the movie ), and growing as a team in chess.
I was making a joke, don't worry. And ThrillerFan is right, don't play an opening simply because it shares a name with your country, play it because it works for you (even though his annoyance in his comments can be toned down a bit). Is it okay to find it interesting? Yes. Is it good to play it solely because of the name? No. There's a reason why Latvians don't play the Latvian Gambit, why Americans don't play the Nimzo-American Sicilian, and so on and so forth. It's because the opening isn't that great.
I truely play the french because I can survive the openning against hardly oponnents just knowing a pair of lines .
but there is a kind of "something" that we don´t know about our subconscient I think
Do you think players use to have predilection to some opennings whose name has any connection with his country?
I mean, do spaniards play the spanish-Ruy Lopez, italians the sicilian, french the french and so?
Do you know any study about this topic?