At that point, I moved back to India. And I had to converse with a telephone company call center, even though I selected English as my language in the phone tree, they repeatedly put me to Hindi speaking ones - I just could not converse with them. I tried. I could absolutely understand them, but I could just not speak hindi. The words or rather the sentences will not form.
Not any more. I think now I am truly bi/trilingual, but there was that day / week / month / year, when I had lost the ability to speak in Hindi. Not sure why, and it was not a one time event.
[ The only additional information that may be relevant : In between these years, I learned a semester of Russian. I learnt french. I got familiar with a multitude of south Indian languages - Tamil, Kannada, Telugu, Malayalam hearing friends speak them on a regular basis. And I was also conversant with Punjabi, common in our region in north india. But I never spoke any of these in day to day life for 14 years. And all these languages blurred into each other when I really had to use something other than English. ]
[ Also, I had a reason to switch to English pretty much exclusively. My son has learning disability and would find it hard in school as he will speak in Hindi and teachers would not understand. This is a long time back. So I decided not to confuse him and switched to english exclusively and lived like that for about a dozen years before this telephone company incident happened. I have posted about him before, this is not new: https://news.ycombinator.com/item?id=28665942 ]