a man's home is his castle

Etymology
Traditional; the sentiment dates back to Roman times:
 * quid enim sanctius, quid omni religione munitius, quam domus unusquisque civium?
 * What more sacred, what more strongly guarded by every holy feeling, than a man's own home?
 * —Cicero

In English, see Book 4, Chapter 16 of William Blackstone's Commentaries on the Laws of England:
 * And the law of England has so particular and tender a regard to the immunity of a man's house, that it stiles it his castle, and will never suffer it to be violated with immunity: agreeing herein with the sentiments of ancient Rome, as expressed in the works of Tully; quid enim sanctius, quid omni religione munitius, quam domus unusquisque civium?

Translations

 * Arabic: بيت الرجل قصره
 * Bengali: পুরুষের বাড়ি তার দুর্গ
 * Burmese: ေယာကၤ်ားတစ္ေယာက္ရဲ႕အိမ္ဟာ, လုံျခံဳေႏြးေႏြးမႈရွိတယ္
 * Finnish: kotini on linnani
 * French: charbonnier est maître en sa demeure, charbonnier est maître chez lui, cordonnier est maître chez lui
 * Hindi: आदमी का घर उसका महल होता है
 * Polish: pan na zagrodzie równy wojewodzie
 * Portuguese: a casa de um homem é o seu castelo
 * Turkish: Erkeğin evisi onun sarayı
 * Urdu: آدمی کا گھر اسکا محل ہوتا ہے