Certain speakers of English have a tendency to “drop” L’s that occur after a vowel but before another consonant, as in balm, calm, golf, gulf, palm, wolf, and many more.
Often these aren’t completely dropped, but instead change the preceding vowel a little bit. So instead of wolf, they have woof; instead of palm they have pom or pawm; instead of golf, they have gawf.
People who drop their R’s in a similar position are said to have a non-rhotic pronunciation there, or to speak a non-rhotic dialect. What then is the corresponding term for someone who routinely drops their L’s, so “a non-????? speaker”? Lambdacism and lallation seem like dead ends.
This isn’t a new thing either, considering the historical L’s no longer heard in words like could and stalk. Whether it’s growing, I’m not sure, but perhaps so.