“…The possibility of the split of a merger is disputed in the literature under the conventions of Garde's Principle, which holds that once a merger has occurred, it will persist, and Herzog's Principle, which states that mergers expand at the expense of distinctions (Labov, 1994). However, a growing number of studies demonstrate that, with adequate dialect contact, a split may occur (Johnson, 2010;Maguire, 2008;Maguire, Clark, & Watson, 2013;Nycz, 2011Nycz, , 2013Trudgill, Schreier, Long, & Williams, 2003;Yao & Chang, 2016). Nevertheless, the variationist literature informing theories on mergers and splits is biased towards the phonology of English, specifically vowels (Gordon, 2013(Gordon, :204, 2015.…”