How to Say "filler" in Spanish
The Spanish word for “filler” is “relleno” — A2 level. This is a very common word in everyday Spanish.
English → SpanishA2
nounA2
unnecessary parts of a story or video

Examples
El relleno de este pastel es de chocolate amargo.
The filling of this cake is dark chocolate.
No me gustó la película, tenía mucho relleno.
I didn't like the movie; it had a lot of filler (unnecessary scenes).
Esta almohada necesita más relleno.
This pillow needs more stuffing.
Using 'de relleno'
When you call something 'de relleno', you're saying it's just there to take up space, like a boring scene in a TV show.
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