Sometimes it's no good getting fragments from people who half understand. You need to go to the experts and understand why. Here Dr McQuillan explains why languages need to be acquired.
I am Jeff McQuillan, a former high school and university Spanish teacher and associate professor of language education, now a Senior Research Associate at the Center for Educational Development in Los Angeles, California. I also currently host English as a Second Language Podcast, the most popular language teaching podcast on the Internet, although perhaps not the best.
Dr McQuillan has published widely on the topic of language acquisition and on efficiency in language learning. He has published many papers on comprehensible input and has collaborated frequently with Dr Stephen Krashen.
Here is his web page where you can find up to date research.
http://backseatlinguist.com/blog/
#languageacquisition
#polyglots
#learnalanguage