[Tagging] Draft Proposal: Default Langauge Format

[Joseph Eisenberg]

I've started a Draft Proposal page
<https://wiki.openstreetmap.org/wiki/Proposed_features/Default_Language_Format>for
this language format tag, based on our discussion here. It still needs more
links and rendering examples, plus your comments

The draft proposal outline:

Specify the default language format used for name labels and tags. This tag
shows the default language and script that should be used to display name
labels on an international map. By avoiding the use of the default *name=* *tag
for the display of name lables, this proposal will encourage the use of
name tags that include the language code, thereby improving the quality and
utility of the database.

The key *language:default *with the 2 or 3 letter ISO language code as
value should be tagged on administrative boundary relations, such as
countries, provinces and aboriginal communities to clarify the default
language used for the majority of default *name=**tags within a particular
region or settlement. If multiple scripts may be used for the language, a
qualifier may be added to specify the script format. Multiple languages can
be specified, separated with a semicolon, for an administrative boundary or
place if the local community has decided to include more than one name in
the default name label and wishes general map rendering to display more
than one name.

The language:default tag will be applied to the largest existing boundary
relation that accurately represents the language used for default names.
When a smaller administrative boundary has different default language
format, this boundary should receive a language tag as well. This would
include boundaries of aboriginal lands and municipalities where a different
regional or local language is dominant.

The language:default tag may also be applied to individual objects when the
language format of the object's name is different than the default for the
region, for example when the common name for a feature is in a language
foreign to the region, or in a rarely used local language.

If name tags commonly include additional local or official languages in a
region or settlement, in addition to the default language format, the
boundary or place may be tagged with language:local=* and
language:official=* to specifiy the other languages commonly used. More
than one official or local language can by specified in the value by use of
a semicolon as a divider. However, the default language should always be
specified when verifiable, to reduce the need to tag individual map
features.

See the Proposal Page
<http://wiki.openstreetmap.org/wiki/Proposed_features/Default_Language_Format>
for all the details including futher rational, tagging format, examples,
possible errors, wiki pages that will be updated, etc.:

wiki.openstreetmap.org/wiki/Proposed_features/Default_Language_Format
Thanks for your suggested improvements and comments!
- Joseph Eisenberg

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