This is a question about language learning for different ages, specifically people in the second quarter of their life versus someone in the fourth quarter of their life (assume average life span of 80 years, then age 20-40 is second quarter and age 60-80 is fourth quarter).
We have all heard that infants, toddlers, and young children in general have an "easier" time learning languages, but is there any practical difference between the language learning abilities of a 30 year old and a 70 year old? Under the same conditions, would a 30 year old learn faster than the 70 year old? What are the differences, and how can the 70 year old optimize their language learning ability? Do certain methods work better for older people in general?