Is it true that some Eastern Catholic parishes use English in their liturgy now? Is this allowed?
In the United States many Eastern Catholic parishes celebrate the Liturgy in English. The Byzantine-Ruthenian Catholic Church, for example, celebrates the Divine Liturgy almost exclusively in English in the U.S. This is because they are very Americanized, and have members from numerous racial and ethnic backgrounds. The Ukrainian Catholics, in contrast, are closer to their immigrant roots. They are still receiving new waves of immigrants on a regular basis. Thus, they use Ukrainian in many places because it is what the people are most comfortable with.
The ancient tradition of the Eastern Churches is for Liturgy to be celebrated in the language of the people. Hence, Byzantine Catholics were actually celebrating the Divine Liturgy in English here in America, while Roman Catholics were still using Latin.