Mind the pronunciation and meaning of these two confusing words:

costume /ˈkɒstjuːm/ (dress-up clothes)⇒ disfraz, vestuario
custom /ˈkʌstəm/ (habit, tradition)⇒ costumbre, tradición, hábito

customs /ˈkʌstəmz/ (airport baggage-check area)⇒ aduana

dress up  (in costume)⇒ disfrazarse
disguise /dɪsˈɡaɪz/⇒ disfraz, disfrazar
fancy dress (costume, disguise)⇒ disfraz

Carnival is a public celebration which takes place in many cities and towns in many countries around the world, in February or March each year. Carnival can sometimes last for several weeks. In some places there is only one day of celebration. There are often street parades, bands, costumes and many people wear masks. Carnival is linked to religious traditions in the Catholic and Eastern Orthodox Churches, and it is also linked to local customs. USA Carnival celebrations, usually referred to as Mardi Gras, were first celebrated in the Gulf Coast area of the United States, but now occur in many other states.

Is it a custom in your city to disguise in funny costumes at carnival times?