A dead language is one that is no longer learned as a native language:
(The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009.)dead language
n.
A language, such as Latin, that is no longer learned as a native language by a speech community.
A native language is one's first language:
(MacMillian Dictionary and Thesaurus.)your native language or native tongue is the first language that you learn
The only language which was dead and is now being learned as a native language is Hebrew.
QED


