excessively proud of oneself or one's achievements

आत्म-संतोषी

English Usage: His self-congratulatory tone made the speech unbearable.

Hindi Usage: उसकी आत्म-संतोषी आवाज ने भाषण को असहनीय बना दिया।

an expression of joy in the success or good fortune of another

बधाई

English Usage: They offered their congratulations on her promotion.

Hindi Usage: उन्होंने उसके पदोन्नति पर बधाई दी।