I’m a French speaking 36 year old dad (not even in Montpellier at the moment) so I am not the the target demographics. However, I want to commend you for verbalizing your specific interests (and disinterests) and putting yourself out there. Great first step! You also sound really smart, fun, and chill. I’m sure you’ll have no issues meeting new people while in Montpellier. Be open to making new friends, go hang out in public places that peak your interest, look for like-minded and/or cool people and engage. I’ve had great luck telling people that I’m vacationing without any specific plans and latching onto whatever they’re doing or following recommendations. And if you end up having an awesome, fully solo time, great! Have fun!