It may form a tentative independent branch of that family in the classification of Malcolm Ross (2005), but Palmer (2018) classifies it as a language isolate.[3] However, the only connections are the 1sg and 2sg pronouns na- and a-:
sg
pl
1
na-ya
ne-a
2
a-ya
omase
3
mena
morimene
Usher classifies it with the other Trans–New Guinea languages of the Berau Gulf.[4]
Nouns
Nominal inflection for number in Mor is limited to only certain animate nouns, such as mor ‘man’ and mor-ir ‘men’. Other nouns do not inflect for number, such as is ‘bird/birds’.[2]: 97
Vocabulary
The following basic vocabulary words are from Voorhoeve (1975),[5] as cited in the Trans-New Guinea database:[6]
^Mor at Ethnologue (18th ed., 2015) (subscription required)
^ abPawley, Andrew; Hammarström, Harald (2018). "The Trans New Guinea family". In Palmer, Bill (ed.). The Languages and Linguistics of the New Guinea Area: A Comprehensive Guide. The World of Linguistics. Vol. 4. Berlin: De Gruyter Mouton. pp. 21–196. ISBN978-3-11-028642-7.
^Palmer, Bill (2018). "Language families of the New Guinea Area". In Palmer, Bill (ed.). The Languages and Linguistics of the New Guinea Area: A Comprehensive Guide. The World of Linguistics. Vol. 4. Berlin: De Gruyter Mouton. pp. 1–20. ISBN978-3-11-028642-7.
^Voorhoeve, C.L. Languages of Irian Jaya: Checklist. Preliminary classification, language maps, wordlists. B-31, iv + 133 pages. Pacific Linguistics, The Australian National University, 1975. doi:10.15144/PL-B31
^Smits, Leo and Clemens L. Voorhoeve. 1998. The J.C. Anceaux Collection of Wordlists of Irian Jaya Languages B: Non-Austronesian (Papuan) languages (Part II). Leiden-Jakarta: Department of Cultures and Languages of Southeast Asia and Oceania.
Ross, Malcolm (2005). "Pronouns as a preliminary diagnostic for grouping Papuan languages". In Andrew Pawley; Robert Attenborough; Robin Hide; Jack Golson (eds.). Papuan pasts: cultural, linguistic and biological histories of Papuan-speaking peoples. Canberra: Pacific Linguistics. pp. 15–66. ISBN0858835622. OCLC67292782.