the person you marry should be aware right from the word go of what he/she is signing to.due to social and economical reasons its not very easy to always accept and sail smooth, like it or not a time will come when sometimes the kids will be treated as outsiders either within the family or the society. individuals need to assess themselves when entering such relationships otherwise the kids will suffer all their lives.
what we fail to undersand is the kids live with the damage forever,stop being mean and put the kids first.
when the honeymoon period is over and reality strikes will that person respond to the kids as their own.

You will not have a very pleasant day if your wife's son calls 'papa' in yoruba accent. Would you!

as long as it is a genuine papa, i wont mind,its better someone is called papa in a weird language than be molested, afterall the kid will learn more skill by being multilingual.