English was isolated from other Germanic languages on the continent and diverged considerably in vocabulary, syntax, and phonology as a result. It is not mutually intelligible with any continental Germanic language – though some, such as Dutch and Frisian, show strong affinities with it, especially in its earlier stages.[20][page needed] English and Frisian were traditionally considered more closely related to one another than they were to other West Germanic languages, but most modern scholarship does not recognise a particular affinity between them.[21] Though they exhibited similar sound changes not otherwise found around the North Sea at that time, the specific changes appeared in English and Frisian at different times – a pattern uncharacteristic for languages sharing a unique phylogenetic ancesto