Speak Outlander Lesson 11: Slàinte Mhath! Posted on June 12, 2014 by Stephanie Bertone Share this...Facebook0TwitterGrab a friend and raise your glass to Slàinte Mhath! Outlander‘s Gaelic coach Àdhamh Ó Broin shares the latest “Speak Outlander” phrase, “Slàinte Mhath,” which is a toast to good health. Source