If you dub Jar-Jar in english then I think this would be the very first edit to actually do that, if you are going for an alien language then I have some pointers:
-Keep subtitles to a minimum, in the OT the aliens only have subtitles when absolutely necessary in order to prevent the audience constantly reading the screen.
-Do not reverse your dialog, it’s a cheap way to make your alien voice but it is very obvious and doesn’t sound right.
-Match up the lines to the character’s lips, this is very important

Anyway, nice trailer!