Ooof good question! Had a really great French and Spanish teacher when I was a teenager who inspired me. Had a holiday to SW France. French girls. Realising that learning other languages help you learn your own a little better. Then studied it at uni but that it sucked my love for it. Then worked at French companies in really small French villages as a young adult. And my first grad job was selling ski holidays and hotels for a French company. So I guess it’s mostly time in the country + liking the culture and way of life. With Portuguese I’m less inspired by the language. Spanish less so. I’ve never stopped to really wonder why.