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human
[Harry Potter] - Are the spoken incantations universal or do all countries and languages have their own versions of the same spells, said with different words?

I'm thinking about Ron and Hermonie's exchange with regards to the spell; "Wingardium Leviosa".  During that scene (and in the book) Hermonie is trying to teach Ron how to properly say the "leviosa" part of the spell.  

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So it got me into thinking about a Japanese student trying to speak these same words in their own school, "Mahoutokoro".  It's pretty established that "l's" and "r's" are difficult sounds to make if you're not a native speaker of the English language.  So are they working on saying Leviosa properly there, or have they created their own levitation spell, to be spoke in Japanese?

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it was a pretty reoccurring theme in HPGoF that Fluer's accent was very thick in how she spoke throughout the book (ie: " What do I care how 'e looks? I am good-looking enough for both of us, I theenk! All these scars show is zat my husband is brave!") How well did the French Students perform at Hogwarts with their heavy French accents? 

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gpt
AFAIK, different cultures have different focuses on types of magic. For example, Native Americans were much more specialized potionmakers than European wizards. They also practiced wandless magic.

I don't think Rowling has yet shed light on the question of whether spells can do the same thing in different languages, but I'd presume they can - namely for the reason that adept wizards can cast spells without saying them. Learning the words is important for beginner wizards because it helps them to focus on the idea of the spell and conceptualize it. To me, that makes it seem as though spells are more like ideas that wizards have put words to - ideas which a wizard in Asia or South America or so on could have conceived using a different language.