From Eurfa Saesneg, English-Welsh Eurfa/Freedict dictionary ver. 0.2.3: congratulate /kəŋɡɹˈatʃʊlˌeɪt/ <v> llongyfarch <v>
congratulate /kəŋɡɹˈatʃʊlˌeɪt/ <v> llongyfarch <v>