We tend to think that if we stick to traditional foods that we can expect to be safe from problems with blood sugar. What needs to be recognized is that traditional foods were typically raised by the consumer or the farmer was near to the consumer. Preparations were carried out by the person eating the food.
The modern world is different, however. You might very well be eating a traditional diet but what are its constituents? Is that wheat the traditional wheat which was used in the preparation of that bread? How was it prepared? This is important. Traditional preparation will do nothing to offset problems of diet, if the underlying food is problematic.
If you look at our "diabetes epidemic", you will note how much it has taken off in peoples of color across the world in the last few decades. I suspect that some of the reason has to do with newer varieties being substituted for old traditional foods. I know I keep harping on this but the only way to truly know is to test your blood. Don't be complacent. The world isn't very dietarily safe for you or me.