japper bedeutet auf Englisch

bark [barked, barking, barks]▼◼◼◼(to make a loud noise (dogs))
verb
[UK: bɑːk] [US: ˈbɑːrk]The dog is barking. = Le chien jappe.

yap [yapped, yapping, yaps]▼◼◼◼(of a small dog, to bark)
verb
[UK: jæp] [US: ˈjæp]

yelp [yelped, yelping, yelps]▼◼◼◼(to utter an abrupt, high-pitched noise)
verb
[UK: jelp] [US: ˈjelp]