enfold – WPML – alt texts – Media Library – attachment IDs

H there,
after translating pages and posts with WPML (from german to english) we recognise, that the english version doesn’t display the alt texts from the english media library.
Yes, it is possible to change the pictures manually, one by one to the “english” media library, this works.
But is there a way to change all the pictures (the attachment IDs) at once or in a more comfortable way?

[av_image src=....jpg' attachment='2856' attachment_size='full' ...] …[/av_image]
result after translation (by duplicating page or post)
[av_image src=....jpg' attachment='2856' attachment_size='full' ...] …[/av_image]
should be
[av_image src=....jpg' attachment='4638' attachment_size='full' ...] …[/av_image]

Kind regards,
Jochen