User blog comment:Natsu11/Zeref and Natsu?/@comment-117.213.226.84-20120523134137/@comment-10510737-20130606113808

it's a bit far fetched, but it works. Natsu and the other dragon slayers are from the future and were brought to this time on the 7/7/777, and that's why the dragons left them (because they didn't belong in this time). It also explains why Natsu and Gajeel weren't able to leave the guild during the fighting festival arc, because they are really 400 years old. To add to this it would also explain why the language Igneel taught him wasn't the one they use in the present time, because i had changed and evolved like everything else.