there's no fool like an old fool
If a person does not develop wisdom with age , then their foolishness is all the more obvious and shameful .
1920 Agatha Christie , “I Go to Styles”, in The Mysterious Affair at Styles [ … ] Grosset & Dunlap , published March 1927, page 24 :You're an old woman, Emily, and there's no fool like an old fool . The man's twenty years younger than you, and don't you fool yourself as to what he married you for. Money!
if a person does not develop wisdom with age, then their foolishness is all the more obvious and shameful
Arabic: please add this translation if you can
Catalan: a cent anys, coteta verda
Chinese:
Mandarin: 人 老 不 中用 ( rén lǎo bù zhōngyòng ) , 老糊塗 最 糊塗 ／ 老糊涂 最 糊涂 ( lǎo hútu zuì hútu ) , 老人 做 的 蠢事 最 愚蠢 ( lǎorén zuò de chǔnshì zuì yúchǔn ) , 人 無 愚 於 老 而 愚 者 ／ 人 无 愚 于 老 而 愚 者 ( rén wú yú yú lǎo ér yú zhě )
Dutch: hoe ouder hoe zotter
Finnish: vanhuus ei aina tuo viisautta
French: on fait des sottises à tout âge il n’y a que les imbéciles qui ne changent pas d’avis
German: Alter schützt vor Torheit nicht (de)
Italian: please add this translation if you can
Japanese: please add this translation if you can
Korean: please add this translation if you can
Polish: stary, a głupi
Portuguese: please add this translation if you can
Russian: ста́рого пса но́вым фо́кусам не нау́чишь ( stárovo psa nóvym fókusam ne naúčišʹ ) , нет ху́же дурака́, чем ста́рый дура́к ( net xúže duraká, čem stáryj durák )
Spanish: la cabeza blanca y el seso por venir
Welsh: henach henach, ffolach ffolach ( literally “ older older, more foolish more foolish ” )