"Ni partoprenu!"

Translation: Let's participate!

[FredCapp]

One could also say "Let's join in" or "We're in on it." or even "We will do x"

[DavidLamb53073]

...or "Let's take part".

[invernessie]

Again with the "we" vs. "let's" translation. The rollover says we, but the answer is Let's? Shouldn't it be both?

[kanguruo]

Ni means we, but in English you don't have the equivalent of the u-form, so you have to use Let's, but you really translate the u by let's, ni still means we and ni never means let's. It is only because of the u that you use let's.

[StephieRice]

You can use "we" here.

"We should participate" is a correct translation.

[EsperantaGeraldo]

This is exactly how I think about "ni -u" phrases.

[PatriciaJH]

Of course, "let's" is a contraction of "let us," which would translate as "lasu ni." So ni is present.