I KNOW IT !!!
Well, 'just kidding... but whether you're english, french (Yes, I confess...
), or "whatever", I "think" you should pronounce it as "liberty" (in english) (as "key" is pronounced "ky").
And doesn't it sound like the contraction of "Liberty-Key", by the way ?
"LiberKy" ?
"LiberKee" ?