Lecture 6: How Language Changes—Many Directions
The first language has evolved into 6,000 because language change takes place in many directions. Latin split in this way into the Romance languages as changes proceeded differently in each area where the Romans brought Latin.
Lecture 7: How Language Changes—Modern English
As recently as Shakespeare, English words had meanings different enough to interfere with our understanding of his language today. Even by the 1800s, Jane Austen's work is full of sentences that would now be considered errors.
Lecture 8: Language Families—Indo-European
The first of four lectures on language families introduces Indo-European, which probably began in the southern steppes of Russia around 4000 B.C. and then spread westward to most of Europe and eastward to Iran and India.