¿Se lo dijiste?

[Premium]

This is just an example, but how do I know if it's translated as "Did you tell them?" or "Did you tell him?"

By the way, Happy Easter. :D

[JPablo]

I'd go with this,

¿Se lo dijiste a ellos/ellas?

¿Se lo dijiste a él?

Yes, Happy belated Easter (it was 2 Sundays ago... don't you remember?) (Today is a very important celebration in China!)

[Premium]

I'd go with this,

¿Se lo dijiste a ellos/ellas?

¿Se lo dijiste a él?

Yes, Happy belated Easter (it was 2 Sundays ago... don't you remember?) (Today is a very important celebration in China!)

I'm a Muslim. :D
The kids started searching for eggs and got presents yesterday. So, I thought it was yesterday.

Thank you for the answer. Strangely, the subtitle was "¿Se lo dijiste?" and meant "Did you tell them?".

[AngelicaDeAlquezar]

Only context will tell you whom the sentence is talking about. Isolated like that, it's definitely ambiguous. That is why Pablo suggested adding the pronouns. :)

[JPablo]

(By the way, I said "it was 2 Sundays ago, because today is April's Fools!)

[Rusty]

It may help if someone mentions that 'lo' is a direct object pronoun, taking the place of what was said to him/her/you/it/them.
The third-person indirect object pronoun 'se', which replaces 'le' or 'les' when there is also a third-person direct object pronoun, is ambiguous.

[Premium]

(By the way, I said "it was 2 Sundays ago, because today is April's Fools!)

I totally forgot that. :)