that's interesting because reduction or migration of L to W occurs or occurred at certain stage of their evolution in different languages, in Polish there's Ł pronounced as W and used in stems where Russian has Л, example złoto - золото

in Belorussian there's Ў pronounced as W at the endings of such words as verbs in past tense form, where Russian equivalents have Л, example быў - был, and where Ukrainians write Л, but pronounce W or at least they should