The phrase comes from French, where j'aime beaucoup les triangles simply means I really like triangles, and its appeal online has little to do with any single source. Short French voice clips like this circulate on soundboards because the language sounds elegant while the meaning is deliberately trivial. Shared as a quick play and download, it became a niche reaction sound for shape jokes, school and geometry memes, and random non sequitur edits where an earnest declaration about triangles feels funnier than a punchline would in the same spot.