The Internal Revenue Service has announced that new tax glossaries are available in Chinese (simplified), Chinese (traditional), Korean, Russian and Vietnamese. A Spanish version was previously made available online to view and as a pdf to download. The Chinese, Korean, Russian and Vietnamese versions of Publication 850 are only available as a download (click here to select your version) and not yet for online viewing.
The point of the glossaries is to make tax terminology understandable for those taxpayers whose primary language is not English. The publications were developed in cooperation with professional translators and editors.