Improved some messages and prepared them for i18n

modules/utils/__init__.py

@@ -7,5 +7,7 @@ from .autocomplete_utils import (
     autocomplete_user_registered_events,
 )
 from .cache_utils import restore_from_cache
+from .datetime_utils import get_unix_timestamp
 from .event_utils import validate_event_validity
 from .logging_utils import get_logger, get_logging_config
+from .validation_utils import is_event_status_valid, is_operation_confirmed