[1] In 2012, while in the process of submitting the script to Unicode, a more precise representation of the sounds of Osage was formulated, and by the following year had been adequately tested.

In February 2014, a conference on standardizing the reforms was held by Lookout and the staff at the Osage Nation Language Department along with UCS expert Michael Everson.

As in Latin orthography, the ejective consonants are written with a diacritic, and the strongly aspirated stops with digraphs.

The pre-aspirated stops were originally written as digraphs with h, but since they vary by dialect with geminates, the 2014 revision included new letters for them derived by adding a cross-bar.

C is from ⟨T⟩ with the Osage s. S and z are the top halves of ⟨S⟩ and ⟨Z⟩; š and ž are derived from adding a tail to the full letters, much like Latin ⟨ʒ⟩.