"Our family goes to a restaurant weekly."

Translation: Nia familio iras al restoracio semajne.

[RomajiAmulo]

Could you say:
Nia familio semajne iras al restoracio

[FredCapp]

Sure, Duo may not like it, but I think most Esperantists would understand it well enough.

[MathieuBriere]

ĉiu semajno?

[FredCapp]

Mi nur revenis el ĉien