hide one link in nav using CSS in 7.1

hi, 

I think i have asked a wrong question in what i really want for my website before. I have a site in two languages, in English and Chinese. Has anyone figured how to hide one language's links from the other using only CSS(on 7.1)?

I have looked at this here but it does not work for 7.1 at all. I tried this

Quote

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{#header .nav-wrapper a>:nth-child(n1),

#header .nav-wrapper a>:nth-child(n2),

#header .nav-wrapper a>:nth-child(n3),

#header .nav-wrapper a>:nth-child(n4) {display: none;}

}

but it does not work at all, what do i have to replace to make them work with 7.1?

Thank you so much