Old Norwegian
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." Middle Norwegian. The Black Death struck Norway in 1349, killing over 60% of the population. This probably precipitated the current process of language development. The language  in Norway after 1350 up to about 1550 is generally referred to as Middle Norwegian. The language went through several changes: morphological paradigms were simplified, including the loss of grammatical cases and the levelling of personal inflection on verbs. A vowel reduction also took place, in some dialects, including in parts of Norway, reducing many final unstressed vowels in a word to a common "e". The phonemic inventory also underwent changes. The dental fricatives represented by the letters þ and ð disappeared from the Norwegian language, either merging with their equivalent stop consonants, represented by t and d, respectively, or  being lost altogether.