This article is in the early stages of construction and should not be viewed as complete, or even close to being finished.
Welsh is the Celtic language spoken throughout Wales and some nearby parts of England. Mark T. Hooker observes that "Tolkien’s definition of Welsh does not exactly coincide with the modern perceptions of the word. When Tolkien says Welsh, it is as a portmanteau that includes Cornish and Breton as well."
Editor Carl F. Hostetter has noted that the singular form lotheg is formed by the addition of a diminuitive/singular ending -eg/-ig to the plural form loth, much like in Welsh where a singular noun can derive "from a plural form by the addition of a singular ending".