lullaby
In Spanish, the word 'nana' is often used in place of the English word 'nana'. It is considered a term of endearment and is often used to refer to one's grandmother, much like the English terms 'nana' or 'grandma'. It can also refer to a nanny or a woman taking care of children. It's a warm and familiar term used commonly in family settings.
The baby's lullaby is very sweet.
Here, 'nana' is used to refer to a lullaby. This is a very common use of the word 'nana' in Spain. Nana is often used as a synonym for lullaby or cradle song, sung to children to help them sleep.
My grandmother always prepares me breakfast.
In this sentence, 'nana' is used to refer to a grandmother in a colloquial and affectionate way. It is common to use 'nana' and 'tata' in LatAm countries to refer to grandparents.
The nanny has been working in our house for years.
In this context, 'nana' means nanny. This use may be common in some Spanish-speaking countries. The meaning can be deduced as a person employed by a family to take care of the house and its occupants, often children.