"They are on strike because of their employer."

Translation: Elles sont en grève à cause de leur employeur.

[N.Hilary]

I also answered with "Ils font la grève...", and it was not accepted. I believe the difference is that "faire la grève" means, "to go on strike"; whereas, "etre en grève" means, "to be on strike". Therefore, "Ils/Elles sont en grève..." would be the translation in this case.

[jmbwell]

whats wrong with "parce que leur employeur"?

[bebeyoung1]

parce que (='because') + subordinate clause;
a cause de (= 'because of' or ' due to') + n.

[1uPKlOGD]

Why not “ils ont en grève…

[bebeyoung1]

ils ont = they have;
ils sont = they are.

[Cricuvi]

What's wrong with "ils font la grève"?

[InvertedGo]

They are striking?

[LijuWeng]

Why "elles" not "ils"? Can I use "employer" instead of "employeur?

[bebeyoung1]

1.'ils' can be used as well and can be accepted by duo.
2. 'employer' is in English, while 'employeur' is in French.