it's about My dream.

my dream is not to be a millionaire or have a good job .

My dream is to live with  a happy family life. 
 
one thing is I wish that my wife  would be a foreigner who is good at english.

and I  someimes wonder how our look like the half child would look like. 
 
I have heard  that mixed children tend to be more beautiful and handsome.

and Moreover, if I  do marry a foreigner i can teach both language to my child  My child would learn both langauges. 

I think this  it is good idea. hahaha

it would be happy. (You can say : I would be happy with that choice or, it would be a decision that would lead me into a happy life)

this is about my dream.

my dream is not to be millionaire or to have a good job, 

my dream is to live with a happy family.

one thing is i wish is that my wife is a foreigner and is good at English.

I wonder how a mixed child would look.

I heard that mixed children are more beautiful and handsome.

Also if I marry with a foreigner, I can teach both languages to my child.

I think this is good idea. hahaha 

I would be happy.

This is about my dream.

My dream is not to be a millionaire or to have good job.

It is to have a happy family.

One thing I wish is that my wife would be foreign, and good at english.

(Above is how to best correct the sentence without changing it too much... but I think a better way to phrase it would be to completely reorder and instead say "I wish I could have a foreign wife who speaks English.")

I wonder how our child might look.

I've heard that mixed children are more beautiful and handsome, and if I marry with foreigner I can teach both languages to my child.

I think this is good idea. hahaha

It would make me happy.

(The biggest thing you need to remember is when you use the pronoun 'I' it always needs to be a capital 'I'... okay? :) Great job though!)