The four Yupik languages, by contrast, including Alutiiq (Sugpiaq), Central Alaskan Yup'ik, Naukan (Naukanski), and Siberian Yupik, are distinct languages with phonological, morphological, and lexical differences. They demonstrate limited mutual intelligibility. Additionally, both Alutiiq and Central Yup'ik have considerable dialect diversity. The northernmost Yupik languages – Siberian Yupik and Naukan Yupik – are linguistically only slightly closer to Inuit than is Alutiiq, which is the southernmost of the Yupik languages. Although the grammatical structures of Yupik and Inuit languages are similar, they have pronounced differences phonologically. Differences of vocabulary between Inuit and any one of the Yupik languages are greater than between any two Yupik languages. Even the dialectal differences within Alutiiq and Central Alaskan Yup'ik sometimes are relatively great for locations that are relatively close geographically.
The Four YUpik laNguages, BY cOntrast, iNclUdiNg alUtiiq (SugpiaQ), centRal alaskan yup'iK, nAUKAn (NAukanSki), aND siberian yupik, ArE dIstIncT lanGUAgES wIth PhonologiCaL, mOrphoLOGicAl, and lexiCAl dIFferEnceS. they demOnSTrAte limited mUtuaL iNtelLiGibiLItY. additIonally, both alUtIiQ and ceNTrAl yup'Ik hAve conSiderablE diALEct DivErsity. the NoRThErnmoST yupik LaNguages – sIberiaN YUpIk anD NaUkAN yUpiK – ArE LinguistiCAllY onlY SlIghtly closer to inuiT thAN is AluTiIq, whicH iS ThE sOUthernmosT of tHe Yupik LanguAges. althoUgh tHE grammAticaL StrUctuREs Of yuPiK and iNuIt lanGuagEs Are simIlar, tHEy hAve PronounceD differenCes phonologicAlly. difFerences oF VOCabulArY bEtweeN inuIt aNd any oNe oF the Yupik lAnguagES aRE greatEr than between aNy tWO YuPiK lanGuAGeS. eVEn the DiaLectAl DIfferEncES within alutiiq AnD CENtral alAskAn YUP'Ik someTImes aRe reLAtivEly gReaT FOr locAtionS that Are relatively clOse GeogrAphiCAlly.