No, libra (the unit of mass), and libre (being free) have unrelated origins, afaik. Libra comes from scales, as in the Libra constellation, wheveas libre comes from liber, related to freedom (and not books (or “libro” in Spanish); that’s a different word), which apparently comes from even older languages, meaning “town” or “people”.

So this season’s finished already? With only 10 ep?? Rather short if so…