Not a word yet. I'm still hoping for this year but wouldn't be all that surprised if we don't get it until 2019. DQ localization can be pretty slow.
Especially consider SE's other high profile releases this year (KH3), I don't know what that's going to do for DQ. I personally think they might be adding some features to the US release like they did with 8 - voice acting and orchestrated music and that's what might be taking so long. this is a likely possibility.
anyone know if SE has any events in the upcoming months of Q1 and Q2 where they may be prone to release such info?