Words that come from Proto-Indo-European wlis-

12 words across 5 languages descend from Proto-Indo-European wlis- — including lisp, lisper, lispy, lithp, リスプ, lispen, wlispian, wlisp.

See the etymology of wlis- itself →

English (4)

Middle English (3)

Old English (3)

Japanese (1)

Proto-Germanic (1)