How do exchange rate fluctuations affect international trade balances for developing countries?

I am curious about the relationship between exchange rate fluctuations and international trade balances, particularly for developing countries. Given that many of these nations rely heavily on exports of commodities and imports of essential goods, I wonder how changes in exchange rates impact their trade positions. Specifically, what are the mechanisms through which exchange rate volatility affects export competitiveness and import costs? Additionally, are there examples of developing countries that have successfully navigated exchange rate fluctuations to stabilize or improve their trade balances? I would appreciate insights rooted in economic theory and empirical research on this topic.