"Nevidíme je."

Translation: We do not see them.

[bienvenue_21]

How does 'je' translate as them?

[bienvenue_21]

Because as far as i know '-je' means it is.

[BoneheadBass]

"Je" also means "them." See the Tips & Notes for the Pronouns skill here https://www.duolingo.com/skill/cs/Personal-Pronouns/tips-and-notes.

[rsail]

BoneheadBass, thanks for the link to the Tips & Notes. Very useful.