This wasn't my question at first, but I'm intrigued about the series, so I'm asking for this person and myself.
There are at least 5 books in the series, and the 5th one was released in 2018. There may be more, but this person wasn't sure.
So the plot points that were remembered was a male teenager who realizes something is wrong when he can understand what an exchange student in his class is saying (speaking Brazilian Portuguese).
The other point is later on is constantly being hunted down for being the son of Lucifer (I'm assuming at some point that he finds out the source of his strange abilities and that he never knew his father or maybe adopted). He hated it at first, but accepted it as part of his life.