What is grammar for...

ecco il link al divertente estratto dal film Life of Brian, dei Monty Python.
di seguito il transcript della scena

Monty Python's "Life of Brian" (Romanes eunt domus...)

- What's this, then? "Romanes eunt domus"? "People called Romanes, they go the house"?
- It says, "Romans go home".
- No, it doesn't. What's Latin for "Roman"? Come on.
- Romanus?
- Goes like...?
- Anus?
- Vocative plural of "anus" is...?
- Ani?
- Romani.
- "Eunt"? What is eunt?
- "Go".
- Conjugate the verb "to go".
- Ere, eo, is, it, imus, itis, eunt.
- So "eunt" is...?
- Third person plural, present indicative. "They go".
- But "Romans go home" is an order, so you must use the...?
- Imperative!
- Which is...?
- Oh, "i".
- How many Romans?
- Plural, plural. "Ite", "Ite"!
- "Ite".
- "Domus"? Nominative?
- "Go home". This is motion towards, isn't it, boy?
- Dative! Not dative, not the dative, sir! The accusative! Accusative! "Domum", sir! "Ad domum".
- Except that "domus" takes the...?
- The locative, sir.
- Which is...?
- "Domum"!
- "Domum".
- Understand?
- Yes, sir!
- Now, write that 100 times.
- Yes, sir. Thank you. Hail Ceasar, sir.
- Hail Ceasar. If it's not done by sunrise, I'll cut your balls off.
- Oh, thank you, sir. Thank you, sir. Hail Ceasar and everything, sir.
- Finished...
- Right. Now, don't do it again!