Freedom of speech is one of the basic human rights.
Tips
usage
自由权 is the legal/constitutional term — the right (权) to freedom (自由). The phrase often appears as a head noun for specific liberties: 言论自由权 (speech), 宗教自由权 (religion), 人身自由权 (personal liberty). The general concept of 'freedom' on its own is just 自由.