An object can be created in several languages?

Hello,

This can be done only with Falang or Joomfish component.
But you can not create object duplications, because they can not share capacity limitation.

Joomfish is not available for Joomla 2.5

And Falang is the paid

JoomFish is available for Joomla 2.5. It was not available for a long time, but I think it was released few months ago.
JoomFish for Joomla 2.5

Falang is paid, but they also offer free version with signature link. But I think you have to register there to download free version.
Falang for Joomla 2.5 and 3.0

Thank you