 Of the Swiss national languages (), 1,261 speak German, 4 people speak French, 5 people speak Italian, and 1 person speaks Romansh.The age distribution, , in Ernetschwil is; 222 children or 17.2% of the population are between 0 and 9 years old and 183 teenagers or 14.2% are between 10 and 19.Of the adult population, 142 people or 11.0% of the population are between 20 and 29 years old.