Not that the UN is worth anything, but I find some of this interesting. UDHR
Whereas recognition of the inherent dignity and of the equal and inalienable rights of all members of the human family is the foundation of freedom, justice and peace in the world,
the advent of a world in which human beings shall enjoy freedom of speech and belief and freedom from fear and want has been proclaimed as the highest aspiration of the common people
All human beings are born free and equal in dignity and rights.They are endowed with reason and conscience and should act towards one another in a spirit of brotherhood.
Everyone is entitled to all the rights and freedoms set forth in this Declaration, without distinction of any kind, such as race, colour, sex, language, religion, political or other opinion, national or social origin, property, birth or other status.
Everyone has the right to recognition everywhere as a person before the law
Interested in the varying terminology. Human beings undeniably begin as zygotes and are typically born 9 months later. This declaration does not define some philosophical personhood as deserving of this right, but all human beings. But then it backtracks and says humans are born free, before then noting that there should not be discrimination based on birth. Everyone is an ambiguous term as well here.
For comparison, the Office of the High Commisioner for Human Rights, has this explanation of what human rights are: What are human rights?
Human rights are rights inherent to all human beings