Quick answer. Reunion Island (974, French overseas department, 870k population, EUR currency) and Mauritius (independent country, 1.3M population, MUR currency, English-speaking) face different international SEO challenges despite being neighbors in the Indian Ocean (170km apart). Reunion businesses target primarily French-speaking markets (mainland France, French diaspora) and English/German tourists. Mauritian businesses target English-speaking markets (UK, USA, India, South Africa) and Indian + Chinese tourists. Key SEO differences: hreflang setup, hosting choice, currency display, payment methods.