Chabad.org and the Internet Archive offer versions of Yom Kippur prayers translated into English. NLE Resources also offers PDF and Word document downloads of prayer companions, which explain the purpose, meaning and history behind Yom Kippur prayers with limited translation.
The translations provided at Chabad.org come alongside a discussion board where users can discuss the prayer and the translation and tell personal stories related to each prayer. The Internet Archive provides a digital facsimile of a book with the Hebrew on the right side and the English translation on the left. Users can browse the documents online or download them in a variety of file types. NLE Resources also offers some of its Yom Kippur resources in Spanish.