Genealogy / Looking for anyone who is familiar with adoption in Poland [8]

we live in UK . my wife from Poland and i from Ivory coast. Married about 9 years now. we have adopted my niece who has her mother passed away some time ago, in ivory coast. we adopted her since childhood. paid for her education and welfare up to now. she is now 16. all the paperwork is complete in ivory coast. now my wife is going to Poland for some time with our 2 children and want to know if with the paper work that we have , she can bring the child there in Poland? or , is there any thing else she can do to facilitate, the child coming to Poland with her? please help. many thanks. email: ngoran5@aol.com