Wealth as evidenced by sumptuous living.

synonyms: luxuriousness, luxury, opulence.

Dutch: weelde, zeelde, rijkdom, opulentie
Polish: zbytek, luksus

The quality possessed by something that is excessively expensive.

synonyms: lavishness, luxury, sumptuosity.

Dutch: luxe
Polish: wystawność, reprezentacyjność, okazałość