An extensive, online source of Spanish language crochet patterns is LionBrand.com. It offers free, downloadable crochet patterns for a wide variety of items including scarves, hats, wraps and even animals. Many books published in Spanish contain crochet patterns. A list of these books can be found at NeedlePointers.com, with many of these books available for purchase through Amazon.com.
Translation tools are also available for reference, such as the tool at NineRubies.com, where a bilingual crocheter created a list of commonly used words in crochet patterns to allow crocheters to translate your own patterns from English to Spanish.
Beyond Spanish language crochet patterns, some websites such as CraftYarnCouncil.com offer yarn weight information in Spanish. This website also gives you the recommended needle or hook to use with each yarn weight. These charts show the industry standard, making it easy to translate across languages and to be sure you are using the correct tools for your project.
One additional source of Spanish crochet information is a Spanish language crochet blog known as Crochet Concupiscence. The woman who runs the blog regularly complies lists of Spanish language crochet blogs featuring a wide variety of content including Spanish crochet projects and pictures of completed works.