I am French but I mostly read in English. This started when I moved to California for a few months with my significant other, a few years back. In order for me to better speak English, we were reading English books out loud - it helped tremendously and I kept the habit of trying to read a book in its native language (I so want to try Japanese...), and since I read mostly fiction from English writing authors...
Plus, reading in English is FASTER than French - less words, less pages