[Elu] is the name by which is known an ancient form of the Sinhala language from which the modern vernacular of Ceylon is immediately received, and to which the latter bears is of the same relation that the English of today bears to Anglo-Saxon...The name Elu is no other than Sinhala much succeeded, standing for an older form, Hĕla or Hĕlu, which occurs in some ancient works, and this again for a still older, Sĕla, which brings us back to the Pali Sîhala.
The Hela Havula are a Sri Lankan literary organization that advocate the use of the Elu terms over the Sanskritic ones. Elu is often referred to by modern Sinhalese as "amisra Sinhala", meaning non mixed Sinhala.
A feature of Elu is its preference for short vowels, deasipiration and the obliteration of compound consonants found frequently in other Prakrits such as Sanskrit and Pali.
Being a Prakrit, Elu is closely related to other Prakrits such as Pali. Indeed, a very large proportion of Elu word-stems are identical in form to Pali. The connections were sufficiently well known that technical terms from Pali and Sanskrit were easily converted into Elu by a set of conventional phonological transformations. Because of the prevalence of these transformations, it is not always possible to tell whether a given Elu word is a part of the old Prakrit lexicon, or a transformed borrowing from Sanskrit.