SOURCE: Kogos, 1001 Yiddish Proverbs.A "long tongue" in Yiddish, like a "big mouth" in English, indicates that a person talks a lot.
אַ בהמה האָט אַ לאַנגע צונג און קען קיין ברכה ניט זאָגן.
A beheyme hot a lange tsung un ken keyn brokhe nit zogn.
A cow has a long tongue but can't say a blessing.