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They are hosted on the same IP and have almost but not the same content as my mother site which does quite well on google. Some of the lower level apges are identical.
The problem is, these are not spam. They are the only way to get listed in local search engines who need a local domain suffix to list sites (eg mydomain.be or mydomain.co.uk). Now I am afraid Google will penalize us because they won't know the reason for the mirror site.
Does anyone else have experience of mirrors on foreign language domains?
Google generally deals well with duplicates, IMO. Usually, it just keeps the best listing and merges the others into it. Sometimes, though, duplicates cause a major problem so I would try not to get into that position.
If the content is in different languages (so not identical content), then I don't see a problem.
The only problem is that in the foreign laguage versions you can change the language and it is redirected to my mother site in English with good listings that I do not want to damage. This is a mirror.
I'm not sure what you mean in the second sentence. Are there redirects or is the content mirrored?