How can I say this
In a interview I want to tell them that I can speak English and Chinese, of course Chinese is my mother language. So What I should say.
1. I can speak English, besides my native language-Chinese.
2. I can speak both English and Chinese as well.
3. I can not only speak English, but Chinese.
4. As well as Chinese, I can also speak English.
5. I can speak two languages, including my native language Chinese.
6. I can speak two languages, Chinese and English, which is a foreign language to me.

My questions are :
1. have I made some mistakes in previous examples ?
2. which one is the best ? or what does a native speaks say about this ?

Question

How can I say this
In a interview I want to tell them that I can speak English and Chinese, of course Chinese is my mother language. So What I should say.
1.	I can speak English, besides my native language-Chinese.
2.	I can speak both English and Chinese as well.
3.	I can not only speak English, but Chinese.
4.	As well as Chinese, I can also speak English.
5.	I can speak two languages, including my native language Chinese.
6.	I can speak two languages, Chinese and English, which is a foreign language to me.

My questions are :
1. have I made some mistakes in previous examples ?
2. which one is the best ? or what does a native speaks say about this ?

Answer

I can speak Chinese, which is my native language, as well as English.

Answer

There were some mistakes in the grammar.  If this is for a verbal interview, it is best to keep it simple.  Say "I can speak both English and Chinese" and leave it at that.