Does this sound naturally?
1) a lot of the same thing happened a few years ago
2) in Spanish we can find a lot of the same thing too

Question

Answer

Tomas, the question should be, "does this sound natural?"

1. The same thing happened a lot a few years ago.

2. In Spanish, the same thing happens a lot, too."

Answer

Thomas, I would have used things. Example, a lot of the same things happened a few years ago 
because it it is a lot, it would be plural. Also, in Spanish we can find a lot of the same things too.