For anyone trying to learn English (and I am so very thankful that it's my native language), the idioms and idiosyncrasies make it so difficult. However, it is also fascinating to study this ever-changing tongue and how usage changes over time.
There is an NPR program called "A Way With Words" (http://waywordradio.org./) that is wonderful. It's one of the few podcasts that I download and listen to regularly.
It also makes me realize that my interest in words and their roots is a mere hobby, compared to the intense and often all-consuming interest it holds for others. I dabble, they are consumed.
A public radio program about language examined through history, culture, and family.