Below you'll find a list of the databases used most frequently for the study of languages, literature and culture. Many of these databases, like the HillSearch Catalog, will enable you to limit your search to materials published in a particular language as is illustrated in the example below from Academic Search Complete.
In this example, after conducting a search, choose "show more" under the "limit to" header on the left-hand side of the page.
You will be presented with a selection of search options, including specifying langage, as indicated in the image below.