they
pronoun; objective case
they
The men, the women, the animals, the things. It is never used adjectively, but always as a pronoun referring to persons, or as a substitute referring to things. They and their fathers have transgressed against me. Ezekiel! 2:3. They of Italy salute you. Hebrews 13:24. Blessed are they who hunger and thirst after righteousness. Matthew 5:6.
they
It is used indefinitely, as our ancestors used man, and as the French use on. They say, that is, it is said by persons.