When you say hello you can say it in any language you want. When you are going to say something you have to say it politely and use nice words.
You have to just use your first name when you are finished typing your comment.
You have to use full sentences when you are writing.
When you say something you just talk about the information that's in that persons' work. You should also be specific about what you are commenting on.
By Leanah