Cf:
A fool is known by his laughing (Br.). It's a trifle that makes fools laugh (Am.). Laugh and /you/ show your ignorance (Am.). Laughter is the hiccup of a fool (Am.). The louder the laugh, the more empty the head (Am.). A loud laugh bespeaks the vacant mind (Am.). Too much laughter discovers folly (Br.)
Русско-английский словарь пословиц и поговорок. Академик.ру. 2013.