This study aimed to explore the impact of cross-cultural communication on students' confidence in speaking English. In today’s globalized world, proficiency in English is a vital skill. The study focused on the Service-Learning Program involving students from seven countries, which significantly boosted participants' confidence in speaking English. Here, speaking confidence is defined as the ability to speak fluently without hesitation. The research analyzed the positive effects of cross-cultural communication on enhancing students' confidence in using English, considering each country's unique contribution.

Two key questions were examined: (1) To what extent does cross-cultural communication influence students' confidence in English? (2) How does cross-cultural communication aid in developing this confidence? The study used a mixed-method approach, involving 26 students from the 12th Service Learning Program at Xavier Learning Community in Thailand. Data were collected through questionnaires and interviews.

Findings indicated that cross-cultural communication significantly boosted students’ English-speaking confidence by exposing them to diverse language styles and cultural perspectives, and offering practical experience. The language barriers encountered served to strengthen their English skills, leading to continuous improvement and greater confidence. The study suggests further research into how cultural differences and language complexities affect speaking confidence, as well as the role of feedback and support in enhancing English-speaking confidence.