BBC News - 20 readers who lost fluency in their language
When I was in my early 20s I spent 6 months living in Belgium. Coming back to England, I found myself speaking in French at the first railway station I reached. And when I did an exam (in England, in English) I found that I could not remember the English words I wanted to use, and wrote notes in the margin saying the French word for what I wanted to say!
