Old Norwegian ( and ), also called Norwegian Norse, is an early form of the Norwegian language that was spoken between the 11th and 14th century; it is a transitional stage between Old West Norse and Middle Norwegian, and also Old Norn and Old Faroese. Its distinction from Old West Norse is a matter of convention. Traditionally, Old Norwegian has been divided into the main dialect areas of North Western, Outer South Western, Inner South Western, , North Eastern, and South Eastern. Phonological and morphological features One of the most important early differences between Old Norwegian and Old Icelandic is that h in the consonant combinations hl-, hn- and hr- was lost in Old Norwegian around the 11th century, while being preserved in Old Icelandic. Thus, one has e.g. Old Icelandic 'slope', 'curtsey' and 'ring' vs Old Norwegian , and , respectively. Many Old Norwegian dialects feature a height based system of vowel harmony: Following stressed high vowels (, , , , , ) and diphthongs (, , ), the unstressed vowels and appear as i, u, while they are represented as e, o following long non-high vowels (, , , , ). The situation following stressed short non-high vowels (, , , , , ) is much debated and was apparently different in the individual dialects. The u-umlaut of short (written ǫ in normalized Old Norse) is not as consistently graphically distinguished from non-umlauted as in Old Icelandic, especially in writings from the Eastern dialect areas. It is still a matter of academic debate whether this is to be interpreted phonologically as a lack of umlaut or merely as a lack of its graphical representation. Old Norwegian had alternative dual and plural first person pronouns, mit, mér, to the Common Norse vit, vér.'' Old Norn Norn is an extinct language derived from the North Germanic language family that died out in the late 19th or 20th century. It was primarily spoken in the Northern Isles, or Orkney (Orkneyjar) and Shetland (Hjaltland), and Caithness on the northern tip of Scotland. Little remains of Norn other than a few literary works in Orkney Norn and Shetland Norn, while Caithness Norn is expected to have died out in the 15th century, replaced by Scots. Sources from the 17th and 18th century report that Norn, often misidentified as Danish, Norse or Norwegian, was in a rapid decline, although prevailing in Shetland more than