Stroop theorises that the lowering ofwel open-mid to open diphthongs kan zijn a phonetically "natural" and inevitable development and that Dutch, after it had diphthongised the long high vowels like German and English, "should" have lowered the diphthongs like German and English as well. Hetgeen staat daar in dat document? https://agentur97531.mappywiki.com/939033/mijn_beedigd_vertaler_engels_krijgen_om_te_werken