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@lil5

It's not "Firefox-only" per se, it's CSS. Firefox is fast when it comes to implementing updates that benefits multilingual and Asian support, and Chromium is either slow, implements a small part only, or just ignores it completely.

(aside: Another good example is `Ruby` annotation. Firefox's implementation of Ruby is up-to-date while Chromium's stuck in 2010.

And this is very very annoying, you have to design for Chromium when it comes to Ruby annotations; or use JavaScript to serve different Ruby codes per browser. Chromium is practically the "modern IE6".)

It's the same with `:lang()`.

In Chromium, you still have to do it like this:

```
:lang(en-GB), :lang(en-US), :lang(en-AU), :lang(en-NZ), :lang(en-PH) { }
```

In Firefox you can do it this way:
```
:lang(en-GB, en-US, en-AU, en-NZ, en-PH) { }
```

or

```
:lang("en-GB", "en-US", "en-AU", "en-NZ", "en-PH") { }
```

Another example, in Chromium:
```
:lang(ceb-Tglg), :lang(pam-Tglg), :lang(fil-Tglg) { }

:lang(ceb-Hano), :lang(pam-Hano), :lang(fil-Hano) { }
```

In Firefox:
```
:lang(\*-Tglg) { }
:lang(\*-Hano) { }
```

or

```
:lang("*-Tglg) { }
:lang("*-Hano) { }
```

^_~