umm pretty much just the words they say and their accent *O_O ._.
"interesting maths" are "des math intéressants" in French.
The word "interesting" in French is translated as "intéressant".
"Vraiment intéressante" means "really interesting" in French.
intéressant
intéressant
most poeople that speeck french our from franicas
intéressant(e)
Intéressant is French for interesting.
pas interessant
Ce n'est pas intéressant.
intéressant(e)
c'était une journée interessante