The website of Greek Orthodox Archdiocese of North America has an excellent article explaining the Services of the Bridegroom.
"Beginning on the evening of Palm Sunday and continuing through the evening of Holy Tuesday, the Orthodox Church observes a special service known as the Service of the Bridegroom. Each evening service is the Matins or Orthros service of the following day (e.g. the service held on Sunday evening is the Orthros service for Holy Monday). The name of the service is from the figure of the Bridegroom in the parable of the Ten Virgins found in Matthew 25:1-13." For the rest please go to http://lent.goarch.org/bridegroom_services/learn/
. For a booklet that contains these services in English, please go to Saint Vladimir's Press and order The Bridegroom Serrvices of Holy Week: http://www.svspress.com/product_info.php?cPath=43_24&products_id=1278&osCsid=nakkren8c1lh5pqc4493grkch3
I would also recommend that you obtain and carefully read Father Alexander Schmemann's classic, Great Lent: Journey to Pascha
, which covers this very special period in the life of Orthodox Christians, again in English. I do not know if any of the above has been translated into other languages. May be other members of this board can help out.