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The Polyglot Book of Mormon (more) allows you see side-by-side passages for English, German, French, Spanish, Portuguese, and Italian.  Just select between one and six languages from the list above.

By default you will see the passage from 3 Nephi 11. To choose a specific passage of scripture, select a book from the list in the upper right hand corner and input the chapter number in the first box (and optionally the verse(s) in the second box, e.g. 12 or 12-16).

You can also search for words and phrases from the entire Book of Mormon.  To search within a particular language, select that language and then enter the desired word in the LANG 1 box in the upper left hand corner.  By default the search will apply to the entire Book of Mormon.  To limit it to the specified location, select this option via the checkbox.

You can also search for a word or phrase in the second language as well.  This allows you to find, for example, all of the verses that have a certain word or phrase in Language 1 (e.g. English "became") and a corresponding word or phrase in Language 2 (e.g. Spanish "se hizo").