First, welcome to the forums and your English is fine!
You can't really re-use animations with the bone behavior. You can get around it though by importing every character graphic into the same skeleton and changing the sprites at runtime. So you have your character's sprites: body, arms, legs, etc, all set up with the bone behavior. On the animation tab for each body part, make a new animation for each character you have, name it appropriately and import that character's graphic. Lastly, use a private variable that contains the name of the character you want to use. Then just switch all of the sprite animations for each body part to that private variable.
That's a quick overview of how I do it. Hope it makes sense!