dekh bhai,

Its deutsch, not german

Its guanhua , not mandarin

Its francais, not french

Its Español not spanish

Ok come to India,

Its baangla , not bengali

Context always changes from different language's view, et you see ' bengali' as a language

You just pointed out what you think it to be mistake but you did not correct me, because in some other terminology of ther language, they would use some different word to represent your language.

Indo European people denote language as belonging to uniform people.

So russians speak russian, Chinese speak chinese, spanish speak spanish n so on

Its ok to call the language malayali speak as malayali.Being from a primary bengali medium , we learnt it as malayali

not only that,kannada is pronounced as kannad कन्नड़

It annoys people, but a large % of people learn this way.We are not knowledgeably wrong, its just that when a large group 3500 km away from you, learns about you, there is gonna be some ambiguation and disambiguation.

Next time, you see them doing this, you may not blatantly say what they learnt is wrong. Because they did not do it intentionally.

However if you think I am morally wrong, would avoid the usage so as to not annoy more people like you. So