Trøndersk (Urban East Norwegian: [ˈtrœ̀ndəʂk]), also known as trøndermål (Urban East Norwegian: [ˈtrœ̀ndərmoːɫ]) or trøndsk (Urban East Norwegian: [ˈtrœndsk]), is a Norwegian dialect, or rather a group of several sub-dialects. As is the case with all Norwegian dialects, it has no standardised orthography, and its users write either Bokmål or Nynorsk.
It is spoken in Trøndelag county, the Nordmøre district in Møre og Romsdal county, and in Bindal Municipality in Nordland county in Norway as well as in Frostviken in northern Jämtland in Sweden, which was colonized in the 18th century by settlers from Nord-Trøndelag and transferred to Sweden as late as 1751. The dialect is, among other things, perhaps mostly characterized by the use of apocope, palatalization and the use of voiced retroflex flaps (thick L). Historically it also applied to contiguous regions of Jämtland and Härjedalen.