Latin nox, Greek nýx, Sanskrit nákt-, German Nacht and English night are all one inherited word, and it is among the most stable in the entire family — recognisable across four thousand years and half a continent with barely a consonant out of place.
What varies enormously is the mood. In the European traditions night-names tend toward mystery, calm, or dark beauty. Arabic layl gives Layla, which came to Europe through the Persian and Arabic romance of Layla and Majnun and arrived in English pop music by a very indirect route; in its original setting the darkness is about longing and separation rather than glamour.
Sanskrit niśā and rātri both name night, and Rātri is addressed in a hymn of the Rigveda as a protective presence — night as shelter rather than threat, which is close to the opposite of the association the word usually carries in English.
Several traditions on this page name daughters for a specific quality of the night — moonless, starlit, the last hour before dawn — with a precision that European vocabulary does not really support.