Murteellisissa
Murteellisissa is a Finnish grammatical form that functions as the inessive plural of the adjective murteellinen, meaning dialectal or relating to dialects. It is used to describe features, words, or forms that belong to Finnish dialects rather than to Standard Finnish.
In Finnish morphology, adjectives decline for number and case. The nominative plural is murteelliset, the genitive
Usage and significance: Murteellisuus refers broadly to the quality of being dialectal, while murteellisissa is a