Adding support for a new language

An app that needs to support a language that’s not included in
GlobalMaterialLocalizations has to do some extra work:
it must provide about 70 translations (“localizations”)
for words or phrases and the date patterns and symbols for the
locale.

See the following for an example of how to add
support for the Norwegian Nynorsk language.

A new GlobalMaterialLocalizations subclass defines the
localizations that the Material library depends on.
A new LocalizationsDelegate subclass, which serves
as factory for the GlobalMaterialLocalizations subclass,
must also be defined.

Here’s the source code for the complete add_language example,
minus the actual Nynorsk translations.