Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="hello-example">
    <a href="http://example.com">English:</a>
    <span lang="en-us en-gb en-au en-nz">Hello World!</span>
</div>
<div class="hello-example">
    <a href="#portuguese">Portuguese:</a>
    <span lang="pt">Olá Mundo!</span>
</div>
<div class="hello-example">
    <a href="http://example.cn">Chinese (Simplified):</a>
    <span lang="zhCN">世界您好！</span>
</div>
<div class="hello-example">
    <a href="http://example.cn">Chinese (Traditional):</a>
    <span lang="zh-TW">世界您好！</span>
</div>

SassMeister-input.scss

// ----
// Sass (v3.3.14)
// Compass (v1.0.0)
// ----

/* All spans with a "lang" attribute are bold */
span[lang] {font-weight:bold;}
 
/* All spans in Portuguese are green */
span[lang="pt"] {color:green;}

/* All spans in US English are blue  */
span[lang~="en-us"] {color: blue;}

/* Any span in Chinese is red, matches simplified (zh-CN) or traditional (zh-TW) */
span[lang|="zh"] {color: red;}

/* All internal links have a gold background */
a[href^="#"] {background-color:gold}

/* All links to urls ending in ".cn" are red */
a[href$=".cn"] {color: red;}

/* All links to with "example" in the url have a grey background */
a[href*="example"] {background-color: #CCCCCC;}

SassMeister-output.css

/* All spans with a "lang" attribute are bold */
span[lang] {
  font-weight: bold;
}

/* All spans in Portuguese are green */
span[lang="pt"] {
  color: green;
}

/* All spans in US English are blue  */
span[lang~="en-us"] {
  color: blue;
}

/* Any span in Chinese is red, matches simplified (zh-CN) or traditional (zh-TW) */
span[lang|="zh"] {
  color: red;
}

/* All internal links have a gold background */
a[href^="#"] {
  background-color: gold;
}

/* All links to urls ending in ".cn" are red */
a[href$=".cn"] {
  color: red;
}

/* All links to with "example" in the url have a grey background */
a[href*="example"] {
  background-color: #CCCCCC;
}

SassMeister-rendered.html

<div class="hello-example">
    <a href="http://example.com">English:</a>
    <span lang="en-us en-gb en-au en-nz">Hello World!</span>
</div>
<div class="hello-example">
    <a href="#portuguese">Portuguese:</a>
    <span lang="pt">Olá Mundo!</span>
</div>
<div class="hello-example">
    <a href="http://example.cn">Chinese (Simplified):</a>
    <span lang="zhCN">世界您好！</span>
</div>
<div class="hello-example">
    <a href="http://example.cn">Chinese (Traditional):</a>
    <span lang="zh-TW">世界您好！</span>
</div>