As far as the information from the HP books (and movies), Fantastic Beasts first movie, and as you mentioned in your question, the non-wizarding world people are addressed as: MUGGLES by the British community NO-MAJ (NON-MAGICALS) by the American community However, according to David Yates (director of the new Fantastic Beasts movie), in his interview here , he mentioned that the French address non-wizards as: NON-MAGIQUES Which is undoubtedly the literal translation of the American term.
However, as far as I have read, searched and seen online, these are the only three terms mentioned.
( Fingers crossed for some new reveals though! )
scifi.stackexchange.com/users/92306/Shreedhar
Even though only two words have been officially disclosed, we could assume other countries would use the words introduced in official translations of HP books.
There's a list of translations for "muggle" at Harry Potter Wikia .
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I dont believe Rowling has answered this.
I suspect we might find out what muggles in France are called with the next Fantastic Beasts movie.
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In the Finnish translations, it is Jästi .
The source is a currently unavailable pro gradu work for Tampere University linguistics: http://uta32-kk.lib.helsinki.fi/bitstream/handle/10024/90829/gradu00230.pdf (gives a timeout error at the moment)
Hanna Karppinen: Harry Potter -kirjojen suomennoksissa käytetyt uudissanat, Appendix 2.
Pro gradu.
Tampereen yliopisto, 2003 Translation: "The neologisms used in translations of the Harry Potter books" Funnily enough, the word means a person that is an outsider.
One that does not belong to any circles.
It can be any kind of a circle, ie.
a group of people with a common interest or background.
The word itself was selected by the Finnish translator, Jaana Kapari, from the word jästipää which means a very stubborn person.
Stubborn to a level of stupidity.
https://fi.wiktionary.org/wiki/jästi
Btw, the English version of that page tells that it's a person who does not partake in geocaching, but that seems to be someone's joke addition :)
scifi.stackexchange.com/users/21237/Juha Untinen
In India, they're called "मगलू" in Hindi which in English would be pronounced as "Mugloo" .
Source: glosbe.com/en/hi/Muggle and also from Harry Potter Wikia .
For the pronounciation part, you can copy paste the Hindi word in the translator and listen to the audio
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Ok, this is just speculation on my part... but hear me out: Since it's not actually an english word (Unless you consider it's root as 1920's New Orleans slang for a joint and/or hot chocolate.)
but rather a wizard world word
I'd think that most countries would have a local word derived from olde wizarde or high wiz (or whatever the spell language is called) such as Muggle in English, Mugglare in Swedish and मगलू in Hindi (as Abhi stated).
Some communities could try and mark their uniqueness and standing apart from the other wizarding world by making up words (such as the americans with their slang word "no-maj")
but the word "Muggle" would still be recognizeable by them.
scifi.stackexchange.com/users/95897/Doomfrost
Muggles, as we know, are the people who have no magical ability and are born in a non-magical family. Non-magical people are called Muggles in the British magical community and 'No-maj' in the American community. But we can find wizards in other countries also. E.g the twins Parvati and Padma Patil were of Indian descent.  What are non-magical people called by magical communities outside of Britain and America?  I am not asking about different languages like German or French. I am asking about different magical communities in other countries.
What is the in-universe term for Muggles in other countries?
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<harry-potter><muggles><terminology>
scifi.stackexchange.com/questions/184055
scifi.stackexchange.com/users/83884/Tyrion Lannister
It doesn't appear that that JK Rowling has answered this question. However, David Yates (director of the Fantastic Beasts movie) has mentioned that the French wizards refer to muggles as "Non-magiques". JK Rowling has not answered this question yet so the only terms we have are 'muggle', 'non-maj' and possibly 'non-magiques' in France.
The only known terms are 'muggle', 'non-maj' and possible in France 'non-magiques'. JK Rowling has not answered this question.