I'm Polish so reading in native language is one point.
Since I live nearle 20 years in Germany and speak german on the same level of quality as polish, i could name it as equal to native.
so the Poll misses an "I'm multilingual or multi-native speaker" option
Finally I've got to name english since i got used to read and use english texts by Linux usage and RPG
from then on I read some of my stuff in english, even if I have to accept that it is a bit heavier sometimes *sigh*
But I'd never let myself frighten of bythe fact that a good book is available only in english to me and Cooks Wizardry series taught me it is worth the effort