Sentences. Could anyone correct this for me? Thank you so much.

Could have a quick word with you?
This is a slow train.
He talked very interestingly about his work.
you've cooked that meat wonderfully.
I have an easy job for you.
She writes in perfect english.
She sings very well.
Could speak more quietly, please?
I am writing to you from our holiday home,
If you learn a languge when you was a child, you will be a bilingual person. (just you will be bilingual is enough but what you wrote is not incorrect ) 

If you were like you , I would go running that place. (not sure what you mean. i would be running that place, i think )

Mostly correct 

Sentences. Could anyone correct this for me? Thank you so much.

Could I have a quick word with you?
This is a slow train.
He talked very interestengly about his work. [His talk about his work was very interesting]
You've cooked that meat wonderfully.
I have an easy job for you.
She writes in perfect English.
She sings very well.
Could you speak more quietly, please?
I am writing to you from our holiday home. 
If you learned a languge when you were a child, you will be a bilingual person.
If you I were like you, I would go running that place there.