Can it also be "Han er kjempeinterresant"?
Indeed it can, as long as you spell it "kjempeinteressant". :)
Beklager! Naa forstaar jeg. Tusen takk
The word for interesting reminds me of the French one
Why the word of kjempe need to put together with other word?
It's a prefix.
"Interessant" always makes me second-guess myself... I took French at school and "interessant" looks so weird next to Germanic words.
i'm tempted to pronounce it the way i would in french
Please, so I added an a typo yes, error no, nei