Questions | Official CyanogenMod 10.1 Nightlies

hi

1. if i'm on cm9 with the 'cm9 safe kernel', is it safe to flash with this kernel the official cyanogenmod 10.1 nightly rom ?
2. does the cyanogenmod 10.1 nightly have hebrew on it ? if yes, doest it support RTL (right to left) ?

thanks