「フランス人には親日家の人は多いですか？」って英語でなんて言うの？

You can use the following sentences to structure your sentences:
1)Are the French people pro-Japanese.
2)Does French people like to visit Japan.

Do you like Japanese people generally?
MEANING= this is asking if, in general you like Japanese people? That can mean a whole country – so this is quite a vague question.

What is your view of Japanese people?
MEANING= what is your view- means what is your opinion on… so its similar to the first phrase.

Are the French generally Pro-Japanese?
MEANING= this is a direct question asking whether on the whole do French people like Japanese people.

With this question its hard to get a straight answer as its difficult for one nation to generalize another, but good luck!

To find out if a particular nationality (French) is interested in another (Japanese), you can ask:
Are French people interested in Japan?
By asking 'Are French people' it implies the majority or a lot of French people.
You can also say
Are the French interested in Japan?
'The French' also implies the majority of French people.
To be interested in Japan - This is a polite way of asking if they like Japan.

Another way of detecting if they like Japan is to ask if they like to visit Japan often:
Do the French visit Japan often?
When a group of people visit a country often, it means they are interested in it and enjoy meeting people from that country.

I hope that helps!

>What views does the French people have on the Japanese?
This is asking how the French people see the Japanese from there point of view.
Point of view=the position from which something or someone is observed.
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>Are French people interested in the Japanese culture?
interested=showing curiosity or concern about something or someone; having a feeling of interest.
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Warmhearted = marked by ready affection, cordiality, generosity, or sympathy.
To feel at home = to be at one's ease, to feel comfortable in a different environment.
"I really felt at home when I stayed in Italy! I had everything I needed and the people were so friendly!"
Eg "I'm going to Paris in May!"
"Wonderful!
"Are French people warmhearted towards Japanese people?"
"I'm not sure. I just know they like to speak French!"

If someone is 'pro' something it means they like it so if you are asking if the French like Japan/Japanese people then you can say 'Are the french pro-Japanese?' as well as 'Do French people like Japan/Japanese people?'

"Are you pro-Japanese?"
This is a question asking if the individual or persons are fond/like Japanese people.
"Do you like Japanese people?"
A straight,simple and easy question asking if the individual or persons 'like' or are fond/ a good view on Japanese people.