I myself am not yet profitable, so I won't use this as self promotion. But It would be good to hear your struggles and how you've overcame them. In other words, give some background/story as inspiration to others.
what does it mean? is that suggesting "we" as this post is concerned only to europeans only?
One of these things is not like the others.
Bureaucracy can stall anything at any scale, but anything you can call a "side project" shouldn't need financing because if it does that's less "side" and more "career"; nor, given what success looks like for a side project (or even a perfectly adequate small company), should it need to cross language barriers.
Sure, if you only speak e.g. Catalan your market will be small, but that's more than big enough for one person's secondary income stream.
I suspect "but languages!" is the European equivalent to Americans saying they can't do public transport due to how big and empty the US is.
Anyho, I'm currently making some free webgames, with zero expectation of profit (or even payment mechanism) as they're mainly an excuse to play with LLM coding tools in a low-risk domain.