"They must choose the right words."

Translation: Il faut qu'ils choisissent les bons mots.

[Tomchat9]

il faut qu'ils choisissent les mots justes
?

[Jojo553168]

Yes and no. I'd say your sentence is perfect if you mean the appropriate words for that situation but not if you mean the right words from that list.

[Anna486728]

What is wrong with paroles?