Hi Mattia,
Great to hear you are already using The Events Calendar – and thanks for considering our other plugins 🙂
1) Calendar view = default template (full-width) but Single event view = page w custom sidebar
Events Calendar Pro does not add any additional functionality in this respect. This sort of thing is possible as a customization, but I’m afraid we don’t have a setting to help you out here.
2) Translate everything.
We’ve worked hard to make everything we can translatable 🙂
If you’re finding there are areas which are not translated you can either submit the missing translations or post a report of the problem if you find you are unable to do so. To learn more, please see:
3) Set a widget for list all the events by tags (or category or any other sentence) as you can do with the filter tag on the main event calendar page.
Now this is something you could buy PRO for: once installed, the events list widget becomes “super-charged” and you can apply tag and category filters to it 🙂
Does that help?