When three people speak lines, it is typically referred to as a "trialogue." This term captures the dynamic of conversation among three participants, similar to how "dialogue" refers to two speakers. However, it's worth noting that "trialogue" is less commonly used than its counterparts for one or two speakers.
Writing dialogue is not as hard as you're letting it seem. You have dialogue all the time -- it's called talking. If you honestly cannot think of what your characters are going to say to one another, you need to go take a break and go somewhere out in public. Sit somewhere in the middle of a crowd for one to two hours and just listen to people talking. Then, go home and write down some of the things you heard people saying. That's dialogue. Extended just means dragged out and longer than normal. Write a long conversation. When you need to have your characters talk, just pretend it's you and a friend (or several friends), and have them say something you'd probably say in the same situation. Then imagine what your friends would say in reply, and go back and forth that way. As you become a better writer, your characters themselves will "tell" you what they want to say, because they become like real people to you. Dialogue is people talking -- extended dialogue is just a long stretch of just dialogue without any interruptions by the author. You're making this much harder than it has to be!
Writing dialogue is not as hard as you're letting it seem. You have dialogue all the time -- it's called talking. If you honestly cannot think of what your characters are going to say to one another, you need to go take a break and go somewhere out in public. Sit somewhere in the middle of a crowd for one to two hours and just listen to people talking. Then, go home and write down some of the things you heard people saying. That's dialogue. When you need to have your characters talk, just pretend it's you and a friend (or several friends), and have them say something you'd probably say in the same situation. Then imagine what your friends would say in reply, and go back and forth that way. As you become a better writer, your characters themselves will "tell" you what they want to say, because they become like real people to you.
So that English speaking people could read and understand them
If you mean Hindu Arabic numbers, then people use it in every English speaking country. If you mean the Hindu Arabic Alphabet, then there is no such thing.
They are called identity thefts.
Dialogue
This is called a duologue - similar to one person talking being a monologue
Dialogue = 2+ people Monologue = 1 person
Dialogue is people speaking, so it's not the same as action.
A monologue (mono means one) is spoken or written by one person, a dialogue (di means two) is performed by at least two people.
Dialogue - from di (two) and logos (speaking, conversing) - a conversation; people speaking together
Basically one is correct and one isn't. The accepted term in both psychology and literary usage is "internal monologue." A dialogue is between two people. A monologue involves one person. Although the term internal dialogue is sometimes used by people, it isn't the correct usage, unless of course your characters have multiple personalities.
It is a speech by one orator, such as an address by a politician to a crowd of people. It's contemporary meaning is a dialogue given by a comedian to an audience. Such as what Jay Leno or Conan O'Brien would do at the start of their live shows.
Dialogue just means talking and communicating. A dialogue has people speaking with each other.
The opposite of talking is not talking. The opposite of a dialogue (when two or more people talk in a play or film) is a monologue (when only one person talks).
As many people as the writer wants. You can have a dialogue between an entire room, but it gets harder to write after you get more than three or four people involved.
French speaking people are known as francophones.