The language was documented in written materials for over 200 years.
The language was documented as early as the 17th century.
In addition, the city's languages and unique symbols are documented.
The submitted and invited languages must have been documented by 1982.
Although the language was not yet documented in written form, Belcourt made rapid progress.
The Matagalpan languages are long since extinct, and not very well documented.
The historical record seems to suggest a picture of great linguistic diversity (similar to California) although most languages mentioned were not documented.
The language is currently being documented with the goal of being able to create new fluent speakers at some time in the future.
The language is well documented and is noted for its occasionally unusual syntax.
The languages of the tribes that constituted these confederations were very poorly documented.
