 During the Merovingian period, the Central Franconian dialects were influenced by Old Low Franconian (Old Dutch), resulting in certain linguistic loans which yielded a slight overlap of vocabulary, most of which relates to warfare.In addition is the subsumption of the High German consonant shift, a set of phonological changes beginning around the 5th or 6th century that partially influenced Old Dutch, and extensively influenced Central Franconian and other Old High German dialects.Old English, Old Frisian and (to a lesser degree) Old Saxon share the application of the Ingvaeonic nasal spirant law.