The Latin Church is that part of the Roman Catholic Church where the Latin rites are or were used in the liturgy. It comprises most Roman Catholics worldwide; all those who are not members of oriental Uniate Churches. Saint Peters Basilica in Rome. ... Latin Rite, in the singular, usually refers to the sui juris particular Church of the Roman Catholic Church that developed, with its own rituals, customs and canon law, in the area of western Europe and northern Africa where Latin was for many centuries the language of education and culture. ... From the Greek word λειτουργια, which can be transliterated as leitourgia, meaning the work of the people, a liturgy comprises a prescribed religious ceremony, according to the traditions of a particular religion; it may refer to, or include, an elaborate formal ritual (such as the Catholic Mass), a daily activity... The term Eastern Rites may refer to the liturgical rites used by many ancient Christian Churches of Eastern Europe and the Middle East that, while being part of the Roman Catholic Church, are distinct from the Latin Rite or Western Church. ...
The LatinChurch is simply that vast portion of the Catholic body which obeys the Latin patriarch, which submits to the pope, not only in papal, but also in patriarchal matters.
The Eastern Churches, small as they are, still represent the old Catholic Christendom of the East in union with the pope, obeying him as pope, though not as their patriarch.
The Latin Rite designates the particular Church, within the Catholic Church, which developed in western Europe and northern Africa, when Latin was the language of education and culture, and so also of the liturgy.
The LatinChurch is a third term, used, for instance in the opening canon of both the 1917 and the 1983 editions of the Code of Canon Law.
The Latin Rite (in the first-mentioned sense) is distinguished from others not only by the use of the aforementioned liturgies, but also by customs, practices and Canon law distinct from those of the Eastern Churches.