zope.i18n locale names have inconsistent capitalisation

[tseaver]

In https://bugs.launchpad.net/zope.i18n/+bug/374606, @markbarratt reported:

i18n/locales/data/en.xml has language element names with initial caps: <language type="aa">Afar</language>. it.xml has lower-case language names: <language type="af">afrikaans</language>, as does de.xml and es.xml. Others vary.

Not a major bug and fixable in CSS but should be consistent (capitalisation being the convention in most Roman-script-based languages).

[mgedmin]

Is this actually a bug, though? Capitalization rules differ: German capitalizes all nouns, English capitalizes languages, Lithuanian doesn't.

The sentence

The document was written in French.

would be translated into Lithuanian as

Dokumentas buvo parašytas prancūziškai.

and it would be incorrect to capitalize 'Prancūziškai'.