Every side project I have ever attempted has taken me ages and never got anywhere. Saying things like localisation need to be done before your MVP ready is nuts.
I'm working on a side project right now. I've tried to learn all my lessons from other attempts. It's just a basic website (landing page). Between building that, trying to sort out product, make a plan, etc - there is barely any time left... I have a full time 9-6 job, and a two hour (total) commute. There's hardly any time left at the end of the day, squeezing out an hours work each day is hard enough. Localisation would never be on my list.
Having the time to check each one of these points is a luxury most side projects can't afford.