Assertion: broken plural | /r/HasProperty | distinct
Facets:
value: from a form of vowel mutation
type: CAUSE
value: formally
type: MANNER
value: from phenomena like the germanic umlaut
type: OTHER
Source sentences:
text: They contrast with sound plurals (or external plurals), which are formed by adding a suffix, but are also formally distinct from phenomena like the Germanic umlaut, a form of vowel mutation used in plural forms in Germanic languages.