PubMed will soon be accepting non-English abstracts into the database.  Users will be able to see the additional language abstracts on the Abstract display page.  When first viewing the abstract page for a record, the default will be to the English abstract.  When there is a non-English abstract as well, there will be a link to it immediately above the English abstract.  To view the non-English abstract, users can click on the link which is the name of the language, e.g. French.

Non-English abstracts will be available only in the Abstract display option and not in the Summary, MEDLINE or XML displays.   For articles which have only a non-English abstract, the default will not be to display the abstract, but users will be able to click the link to display it.  See an example from the NLM Technical Bulletin.