What if I'm thinking of raising my child to speak an artificial language?
Are you thinking of doing this to your son because of a bad experience you've had with language?
Yes, I'm afraid of my child being an English monolingual.
Though it is possible to have a multilingual household, it isn't appropriate to force your child to only speak one particular language as it can prevent your child from interacting with others. Socialization is very important for a child's development and it is wrong to limit it. You should expose your child to many different languages and not just one so that they become accustomed to multiple languages and gain greater verbal ability.
That's just your opinion, I can't let my child grow up monolingual.
It's important for your child to learn multiple languages. This will help your child to gain a better understanding of the world.