The clip is listed with a note that its source is Google Translate, which explains the flat synthetic pronunciation of Wela Mamasitah. Short translated phrase clips like this spread on soundboards and in meme edits because anyone can make and share them, and the robotic delivery turns a simple greeting into a joke. It stays in use as a quick reaction and greeting sound, easy to drop into chats, short videos and edits where an awkward flirty hello is funnier than a normal human voice reading the same line.