How to Say "fad" in Spanish
The Spanish word for “fad” is “moda” — B1 level. This is a very common word in everyday Spanish.
English → SpanishB1
nounB1
a short-lived enthusiasm

Examples
Ahora es moda viajar solo con mochila.
It is currently a trend to travel only with a backpack.
El uso de bicicletas eléctricas se ha puesto de moda en la ciudad.
The use of electric bikes has become popular/trendy in the city.
Esa canción fue una moda pasajera.
That song was a passing fad.
Verbs of Change
When talking about something becoming trendy, use reflexive verbs like 'ponerse' (se ha puesto de moda) or 'volverse' (se volvió una moda).
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