If you want to target a language attribute selector in CSS, you can use the attribute lang.

For example, let says we want to target a div contains a language attribute of en-US. We want to change the font style of text to use italic style.

<div lang="en-US">
This div element tag contains English language.
</div>

Based on above example, we can use the following css code.

div[lang!="en"]{
   font-style:italic;
}