The Hebrew that is translated as “Praise the Lord” in English is translated in the Contemporary Chichewa translation (2002/2016) with Tamandani Yehova. While in the English translation it’s not discernible whether a single or many people are addressed, the Chichewa translation is in the imperative plural form so it’s addressed to more than one. (Source: Mawu a Mulungu mu Chichewa Chalero Back Translation)