No, you cannot send to multiple lists at once.
Moreover, in order to ensure your lists’ hygiene and diminish risks (such as spam complaints or repeatedly bounced emails), you should only use one master list, divided by groups.
Multiple languages
Each list can only have one language If you have a multilingual customer base, you will need to create one list per language you do business in.
Note: If you change the language of the list, you need to edit the confirmation and welcome Emails manually.
Please remember that confirmation and welcome emails cannot be edited within a trial account.