the commoners
He asks permission to speak in the funeral of Julius Caesar.
To explain the reasons for Caesar's death
Julius Caesar spoke Latin. He is also known for the excellence of his Latin prose, which is still read by students of Latin today. He would have delivered speechesand written in Latin but Latin was considered a second 'formal' language even then. Amongst friends and family he would have spoken a kind of lower, colloquial Latin more like modern Italian. Unfortunately, we know very little of this language (not surprising considering as it was almost entirely non-written) what we do know is mainly gathered from graffiti!
In "Julius Caesar", Brutus tells Antony that he can't blame him and his co-conspirators for Caesar's death. He is told to say only the positive things he can remember about Caesar, and to let the plebeians know that the only way he is able to speak at the funeral is by Brutus' permission. Finally, Anthony can only speak from the platform where Brutus is to speak.
The conspirators in "Julius Caesar" are Roman senators and they manage to gather around him by luring him to the Roman Senate. By pretending that they are still loyal, they gather around him to hear him speak and then attack.
Antony
They were more likely to speak in prose and less likely in poetry. Of course, all types of characters speak prose sometimes.
Casca.
He asks permission to speak in the funeral of Julius Caesar.
To explain the reasons for Caesar's death
Mark Antony says it in Act 3 Scene 1 of Julius Caesar, just after Brutus has given him leave to speak at Caesar's funeral.
Julius Caesar spoke Latin. He is also known for the excellence of his Latin prose, which is still read by students of Latin today. He would have delivered speechesand written in Latin but Latin was considered a second 'formal' language even then. Amongst friends and family he would have spoken a kind of lower, colloquial Latin more like modern Italian. Unfortunately, we know very little of this language (not surprising considering as it was almost entirely non-written) what we do know is mainly gathered from graffiti!
Shakespeare had most of his characters speak in blank verse. He went into prose when the characters were of a lower class, or where the character is comic. For example, the Porter in Macbeth speaks in prose, when the rest speak in verse. The witches have a tendency to rhyme as well.
Just about everybody speaks in unrhymed verse called blank verse. Some minor characters never do, and many characters switch to ordinary prose from time to time, but most of them use blank verse as a rule.
No, Trinculo and Stephano also speak in prose.
Julius Caesar grew arrogant near the end of his life. All the honors and power he accumulated "went to his head", so to speak. The conservative Republicans saw this as a first step to a monarchy with the power of the Senate and the people negated.
They speak in prose because "that kind of common language symbolizes their status in life."