hipotecamix - 11:01 am on Dec 22, 2012 (gmt 0)

Hello, I have a domain with pictures of every city in the world with a database, also with google maps with database of all countries.
My site lost 40% of visits on November 17.
I think the reason is because on every page repeats the same text and just change some data (name of city dwellers, zip code, etc.).
Content is of poor quality but the same thing is repeated on every page.
Also I have the same site in another language so Google might consider it doubled.
Any thoughts?
How I can do to recover my visits?