What is the French 'Je ne savais pas que tu parlais français' in English?

I don't know [right] now is the English equivalent of 'Je sais pas maintenant'. In the Word by Word translation, the personal pronoun 'je' means 'I'. The adverb '[ne]...pas' means 'not'. The verb 'sais' means '[I] am knowing, do know, know'. The adverb 'maintenant' means 'now'.