Chaza umehluko okhona phakathi kwezilimi zesiNgisi ezibizwa ngokuthi i-rhotic ne-non-rhotic.
Context:I-rhoticity ngesiNgisi iyindlela yokubiza umlando we-rhotic consonant /r/ ngabakhuluma isiNgisi. Ukuba khona noma ukungabi khona kwe-rhoticity kungenye yezinto ezivelele kakhulu lapho izinhlobo zesiNgisi zingahlukaniswa khona. Ezinhlotsheni ze-rhotic, umsindo wesiNgisi wasendulo /r/ ulondolozwe kuzo zonke izimo zokuphimisela. Ezinhlotsheni ezingezona ezama-rhotic, izikhulumi azisasho ukuthi /r/ ezindaweni ezise-postvocalic <unk> okungukuthi, lapho isanda kulandela unkamisa futhi ingalandelwa omunye unkamisa. Isibonelo, uma uwedwa, isikhulumi sesiNgisi esi-rhotic siphimisela amagama athi hard and butter ngokuthi /ˈhɑːrd/ and /ˈbʌtər/, kanti isikhulumi esingesi-rhotic "silahla" noma "sisusa" umsindo we- /r/, siphimisela wona ngokuthi /ˈhɑːd/ and /ˈbʌtə/.[a] Lapho i-r isekupheleni kwegama kodwa igama elilandelayo liqala ngo-vowel, njengasesimweni esithi "ama-apula angcono", izikhulumi eziningi ezingesi-rhotic zizokhuluma i- /r/ kuleyo ndawo (i-R exhumanisayo), ngoba ilandelwa yi-vowel kulokhu.  Izinhlobonhlobo zesiNgisi ezibizwa ngokuthi ama-rhotic zihlanganisa izilimi zaseNingizimu Ntshonalanga yeNgilandi, eScotland, e-Ireland, nasezingxenyeni eziningi zase-United States naseCanada. Izinhlobonhlobo ezingezona ezama-rhotic zihlanganisa iningi lezilimi zaseNgilandi yanamuhla, eWales, e-Australia, eNew Zealand naseNingizimu Afrika. Kwezinye izinhlobo, njengezasezingxenyeni ezithile zeningizimu nasenyakatho-mpumalanga ye-United States, i-rhoticity iyinhlangano eguquguqukayo yezenhlalo: i-postvocal r isusiwe kuye ngokuthi uhla lwezici zomphakathi, njengokuthi zihlobene kakhulu namuhla ngesimo esiphansi sezenhlalo nezomnotho, ubudala obukhulu, ubunikazi obuthile bezinhlanga, kanye nezimo zokukhuluma ezingajwayelekile.  Ubufakazi obuvela emibhalweni ebhaliwe bubonisa ukuthi ukulahleka kwe-postvocalic /r/ kwaqala ngezikhathi ezithile phakathi nekhulu le-15, yize lokhu kubhalwa kwe- /r/-kwakungajwayelekile futhi kwakulinganiselwe emibhalweni yangasese, ikakhulukazi leyo eyayibhalwe ngabesifazane eNgilandi. Maphakathi nekhulu le-18 leminyaka, i-postvocal /r/ yayisabizwa ezindaweni eziningi, kodwa ngawo-1740 kuya ku-1770s yayivame ukususwa ngokuphelele, ikakhulukazi ngemuva kwama-vowel aphansi. Ngasekuqaleni kwekhulu le-19, izinga laseNingizimu laseBrithani laguqulwa ngokuphelele laba yizinhlobonhlobo ezingezona i-rhotic, yize okunye ukuhlukahluka kwaqhubeka kuze kube yiminyaka yowe-1870.  Ngekhulu le-18 (futhi mhlawumbe ngekhulu le-17), ukulahleka kwe-postvocal /r/ ngesiNgisi saseBrithani kwathonya amadolobha aseningizimu nasempumalanga yeMelika anezibuko ezixhumene eduze neBrithani, okwenza ukuphinyiselwa kwabo okuphezulu kwaba okungeyona i-rhotic ngenkathi lonke elase-United States lihlala liyi-rhotic. Ukuphinyiselwa okungahambisani ne-rhotic kwaqhubeka kuthonya inkulumo yaseMelika yodumo kuze kube ngawo-1860, lapho iMpi Yombango YaseMelika iqala ukushintsha izikhungo zeMelika zomcebo namandla ezombusazwe ezindaweni ze-rhotic ezinokuxhumana okuncane kwamasiko nezikhulu zakudala zamakoloni nezaseBrithani. E-United States, inkulumo engeyona i-rhotic yaqhubeka nokugcina izinga elithile lokuhlonishwa kuze kube maphakathi nekhulu lama-20, kodwa inkulumo ye-rhotic ikakhulukazi yaba nodumo ezweni lonke ngokushesha ngemuva kweMpi Yezwe Yesibili, okubonakaliswe ezindinganisweni zikazwelonke zomsakazo nethelevishini kusukela maphakathi nekhulu lama-20 kuhlanganisa umlando / r /.
Ezilimini zesiNgisi ze-rhotic, umsindo wesiNgisi wasendulo /r/ ulondolozwe kuzo zonke izimo zokuphimisela. Ezilimini zesiNgisi ezingezona ezama-rhotic, izikhulumi azisasho u- /r/ ezindaweni ezingezona ezama-postvocalic, okungukuthi, lapho i- /r/ ilandela umsindo futhi ingalandelwa omunye umsindo. Isibonelo, uma uwedwa, isikhulumi sesiNgisi esi-rhotic siphimisela amagama athi hard and butter ngokuthi /ˈhɑːrd/ no /ˈbʌtər/, kanti isikhulumi esingesi-rhotic "silahla" noma "sisusa" umsindo we /r/, siziphimisela ngokuthi /ˈhɑːd/ no /ˈbʌtə/. Izinhlobonhlobo zesiNgisi ezibizwa ngokuthi ama-rhotic zihlanganisa izilimi zaseNingizimu Ntshonalanga yeNgilandi, eScotland, e-Ireland, nasezingxenyeni eziningi zase-United States naseCanada. Izinhlobonhlobo ezingezona ezama-rhotic zihlanganisa iningi lezilimi zaseNgilandi yanamuhla, eWales, e-Australia, eNew Zealand naseNingizimu Afrika.