Pudd'nhead Wilson (Webster's Spanish Thesaurus Edition)

This edition is written in English. However, there is a running Spanish thesaurus at the bottom of each page for the more difficult English words highlighted in the text.

From Wikipedia:

Pudd'nhead Wilson is an ironic novel by Mark Twain. It was serialized in The Century Magazine (1893-4), before being published as a novel in 1894.

The setting is the fictional Missouri frontier town of Dawson's Landing on the banks of the Mississippi River in the first half of the 1800s. David Wilson, a young lawyer, moves to town and a chance remark of his causes locals to brand him a "pudd'nhead" - a nitwit. His hobby of collecting fingerprints does not raise his standing in the townsfolk's eyes, who see him as an eccentric and do not frequent his law practice.