Reuven Nisser <rnisser@ofek-liyladenu.org.il>:
>
> However, there are times where the change of language is "known" by the
> character set used in the HTML. For example, English is using Ansi 7 bit
> characters but Hebrew & Arabic occupy the upper 128-255. [...]
> In this case, the text language can be derived for the text itself.

Isn't Hebrew (or Arabic) transcribed with Latin letters still Hebrew (or
Arabic)?

> However, if inside such a text I would like to switch to German, I will
need
> to use "LANG=ge".

The two-letter ISO 639 language code for modern German is "de" (for
"deutsch"). Three-letters is either "deu" or "ger", but HTML mandates the
two-letter version if exists one.