That's just how we name multi-part episodes.

@banana_girl said:

That's just how we name multi-part episodes.

They arent multi-part, they are officially separate.

@PRAGMA wrote:

They arent multi-part, they are officially separate.

If the titles of 2 episodes are "Stan of Arabia: Part 1" and "Stan of Arabia: Part 2", it is obviously a "multi-part" episode. No?

And in those cases, TMDb has a naming convention -> the one that @banana_girl linked to in the post above. It's just easier to use this, especially with translations! Imagine we would have to use those instead:

• "Stan of Arabia: Teil 1"
  
• "Stan of Arabia: 1ère partie"
  
• "Stan of Arabia: Parte 1"
  
• "Stan of Arabia: (第1部)"
  
• "Stan of Arabia: "1-я часть"
  
• "Stan of Arabia: 1e deel"
  

And so on. We just use the short form for all those cases.