Ok I will tell the truth.
It is not a hypothetical scenario at all
I just didn't want to have the risk of being outed.
So the scenario is real and it has to be and that is why I have to justify the choice I made for the assignment or find another example in my practice, however the work is nearly done and I don't want to start all over again.
So the father is from a non English speaking country, so is the mother and myself, (I am from the mother's country too, so the child has exposure at our language at her home and mine) and exposure to English in the outside world, his house and my house when needed.
The parents do support the child's language and communication on their own way, but as I look after the child from a very early stage (2 mo) for a very long time, I was the only one who actually had enough time for, singing, rhymes...then came groups, story time, etc.
I noticed that as the child learnt new songs and stories, he was reproducing at home and parents had no knowledge at all of anything that is done in England and were always asking me about it.
When the child started his nursery education they couldn't support the Christmas concert as they didn't know the songs etc.
And maybe I unconsciously picked this particular subject because I remember my daughter's reception TA giving me printed papers with nursery rhymes as my daughter didn't know them properly.
I was mortified because even before I became a nursery nurse assistant and CM, I always took my daughter as a baby and toddler to rhyme time, story time, playgroups etc and had books and CDs at home, but she still didn't learn all the words properly (she has very bad memory) and I felt judged and patronised by the reception's TA who was probably trying to help anyway, but hit a nerve due to my insecurities as a mother and foreigner non English speaker.
Sorry for the lie on the OP. I didn't even imagine I would have such amazing answers.
Thanks