In support of this: in Russian, the adjective for "lucky" and "happy" is the same – schastlivyi.
Though a more precise variant that specifically means "lucky" exists (udachlivyi, meaning possessing greater chances), schastlivyi is more often used to describe a person, with the semantic content being that they are both happy and lucky.
For example, the famous Tolstoy quote about unhappy families being different and happy families all looking alike uses schastlivyi.
Though a more precise variant that specifically means "lucky" exists (udachlivyi, meaning possessing greater chances), schastlivyi is more often used to describe a person, with the semantic content being that they are both happy and lucky.
For example, the famous Tolstoy quote about unhappy families being different and happy families all looking alike uses schastlivyi.