This is Bengali. @Akash J.B. and @iDJ bros are Assamese. The letter র is present only in Bengali; Assamese has ৰ instead. The correct greeting is জন্মদিনৰ শুভেচ্ছা|
Some habits never going to change naa yaar, said earlier in general why im changing Avatar's, When I found something interesting and catchy, I will change with that or making my own Avatar.
You can go to their profile and hit "Ignore" if you don't want to see it.
There is no need to be rude/disrespectful to members with every one of your posts.