Do you have any specific examples? I'm French, lived and travelled in a few countries and I don't see France being much different than any other country with long cultural history in that regard.
The Alliance Française all around the world. I can't think of many other countries that have glorify their own culture internationally, especially in past colonies (like in Vietnam and Cambodia).
The French are hardly the only ones running language and cultural centers abroad. See Portugal's Instituto Camões, Brazil's Centro Cultural Brasileiro, Britain's British Council, France's Alliance Française, Italy's Società Dante Alighieri, Spain's Instituto Cervantes, Germany's Goethe-Institut,and China's Confucius Institute.
Mainly anecdotal but it seems to me that it is a common representation worldwide of the French to be arrogant and very proud of their own culture. I'm trying to not make a judgment here, not that I'm saying it is good or bad.
Anecdotal also, but I work internationally and with a lot of french people. The French groups would be the most vocal to complain about pretty much everything in their host country, claiming they cannot wait to go back to France to taste "Real bread", or "Real wine", etc etc.
I'm French and born in Paris, and I find most of French people very impolite (I live more like a Japanese, with the "fear" to disturb order and people), so I don't complain when I am in another country.
But the only country where I could live is Italy, because they have "real food".
I really suffer with the local food when I'm abroad, and as far as I know, all my friends suffer as well. My wife is Russian but lives in France for many years and she has the same reaction with food in other countries (except Italy!). It's not arrogance, it's pain and a feeling of eating dirty things !
Two words: Académie Française, the governmental body which determines what is official "standard" French, and zealously guards the language against loanwords from other languages in an attempt to preserve a purely French French language.