i think you can just start with changing "kid" to "child"

I always believed that they had the same meaning, but after checking google translate I see why you're complaining

Nice mod! may I suggest changing the mod title to "Lead your children into the forest" it sounds more formal this way. "Let" would be to 'not prevent or forbid' and so wouldn''t apply here.

A friend of mine told me that "Leave" would be better. It seem good, but what's your opinion?

Yes that’s perfect, “Leave your child in the forest”. Notice I said ’child’ - not plural, as the mod only gives you the option of abandoning a child at a time.

Two more recommendations, when the child dies you should lose piety. If the child returns years later, they should rival you, they should gain the trait ‘paranoid’ as well as ‘brawny’ or ‘shrewd’ alongside ‘strong’ & ‘brave’. You should gain the trait ‘stressed’ & ’deceitful’ lose trait ‘honest’. Something to consider.

I've updated the mod, and your ideas are in it. I also add some terrain-related decisions