How to Say "supposedly" in Spanish
The Spanish word for “supposedly” is “supuestamente” — B1 level. This is a very common word in everyday Spanish.

Examples
Supuestamente, el concierto fue cancelado por la lluvia.
Supposedly, the concert was canceled due to the rain.
El director, supuestamente, firmó el contrato sin leerlo.
The director allegedly signed the contract without reading it.
Ella dijo que supuestamente llegaría a tiempo, pero aún no está aquí.
She said she was supposedly going to arrive on time, but she's not here yet.
The '-mente' Trick
Most adverbs in Spanish that end in '-ly' in English are formed by taking the feminine form of the adjective (in this case, 'supuesta') and adding the ending '-mente'. This makes learning adverbs very easy!
Confusing Adverb and Adjective
Mistake: “Using the adjective form when you need the adverb: 'El libro es supuesto bueno.'”
Correction: Use the '-mente' ending when you are modifying a verb or a whole sentence: 'El libro es supuestamente bueno.' (The book is supposedly good.)
Related Translations
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