Romance Languages:
* French: luxe
* Spanish: lujo
* Italian: lusso
* Portuguese: luxo
* Romanian: lux
Germanic Languages:
* German: Luxus
* Dutch: luxe
* Swedish: lyx
* Danish: luksus
* Norwegian: luksus
* Icelandic: lúxus
Slavic Languages:
* Russian: роскошь (roskosh)
* Polish: luksus
* Czech: luxus
* Slovak: luxus
* Ukrainian: розкіш (rozkish)
Other Languages:
* Chinese: 奢华 (shēhuá)
* Japanese: 贅沢 (zetsujō)
* Korean: 사치 (sachi)
* Arabic: فخامة (fakhāma)
* Hindi: विलासिता (vilāsitā)
* Turkish: lüks
This is just a small selection, and there are many other languages with their own unique words for "luxury".