Of course, the Catholic Church is a large group of people, spanning over many lands and crossing cultural boundaries. Some people have different ways of expressing themselves in worship, leading to different liturgies all over the world, I believe there are about 23 in the Catholic Church overall, but we all have the same beliefs, they just celebrate slightly differently.
Yes. It's pretty much the same thing, worship wise. I recommend going to every kind of church imaginable. You learn new things, if not about yourself then about other people. I'm only scared to go to temple. I hear it's segregated by gender. I wouldn't know what to do.
Yeah, usually there are English Masses said at other times (or partly in English), although High Mass is still sung, and usually not in English, but you can follow along in the Missal. You may not be familiar with the hymns though.
"A person who assists at a Mass celebrated ANYWHERE in a Catholic rite either on the feast day itself or in the evening of the preceding day satisfies the obligation of participating in the Mass." -- Code of Canon Law, Can. 1248 ?1; emphasis mine
http://www.vatican.va/archive/ENG1104/__P4N.HTM
Actually there are over 20 different Catholic Churches that make up the worldwide Catholic Church.
In addition to the Latin Rite (Roman) Catholic Church, the Eastern Rite Catholic Churches are in full communion with the Pope, and are part of the same worldwide Catholic Church.
Eastern Rite Catholic Churches include:
Alexandrian liturgical tradition
? Coptic Catholic Church
? Ethiopic Catholic Church
Antiochian (Antiochene or West-Syrian) liturgical tradition
? Maronite Church http://www.bkerkelb.org/
? Syrian Catholic Church
? Syro-Malankara Catholic Church http://www.syromalankara.org/
Armenian liturgical tradition:
? Armenian Catholic Church http://www.armeniancatholic.org/
Chaldean or East Syrian liturgical tradition:
? Chaldean Catholic Church
? Syro-Malabar Church http://www.smcim.org/
Byzantine (Constantinopolitan) liturgical tradition:
http://www.byzcath.org/index.php?option=com_content&task=view&id=145&Item id=62
? Albanian Byzantine Catholic Church
? Belarusian Greek Catholic Church
? Bulgarian Greek Catholic Church
? Byzantine Church of the Eparchy of Kri?evci
? Greek Byzantine Catholic Church
? Hungarian Greek Catholic Church
? Italo-Albanian Catholic Church
? Macedonian Greek Catholic Church
? Melkite Greek Catholic Church http://www.pgc-lb.org/english/index.shtml
? Romanian Church
? Russian Byzantine Catholic Church
? Ruthenian Catholic Church
? Slovak Greek Catholic Church
? Ukrainian Greek Catholic Church http://web.archive.org/web/20080210111559/http://www.ugcc.org.ua/eng/
Since they are both Catholic, there's nothing wrong with it. The traditions are slightly different than the Latin rite (Roman), but since both believe in the authority of the Pope, they are both Catholic, and, therefore, the same religion.