>Most proponents of language tagging mention its benefits in
functions such as spell-checking. I was proposing a somewhat
different use, selecting presentation glyphs based on the
language. I haven't heard anyone else mention this before, so
I doubt it's a high priority on any company's development list.
This capability exists in OpenType. It is important; it has
been mentioned before on this list, and probably will again; as
always with I18N, it will take a while before we start seeing
it show up in shipping software. Note that MS Word 2000 wants
to tag text for language, so it has started, though they
currently only use that info for proofing tools.
By the way, use of Plane 14 tag characters is not necessarily
how all or even many developers will choose to tag text for
language. If text is tagges using ISO 639-2 codes, this can be
done in markup (say, in an XML document) using Plane 0 (Basic
Latin) characters. In a binary document file format, one can do
anything they want.
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