The symbol "Ł" (uppercase) or "ł" (lowercase) is called "L with stroke" or "L with a bar through it." It is a distinct letter used in the Polish alphabet and some Native American languages, such as Navajo. In Polish, it represents a "w" sound, similar to the English word "will." The letter "L with stroke" is not an interchangeable variant of the regular letter "L" but represents a separate sound in the languages that use it.