to sum it up a little bit,before getting into lyrics,animation of 80's and 90's were mainly in kikongo and lingala and had a lot of messages
for example the generique of titanic can literally be twisted into a rumba talking about the same things
then from mid 2000's until now animation is more and more about sex,lingala has become the language used 99 per cent of times vast majority being about sex,or a phenomenon of the moment in kinshasa