I removed the Spanish name of the airport because the official name is Васил Левски (Vasil Levski). If the official Spanish name is different than Vasil Levski, it can be added.
I removed the English and Spanish names of Obelya metro station because they are not different from the one in int_name (which should contain the name in Latin script transliterated from Cyrillic according to the Bulgarian transliteration law, so I also removed Obelia from it). I removed "Monumento" from the Spanish name of the memorial to Petko and Pencho Slaveyko because the information that it is a monument is already contained in the historic=memorial tag. If you have comments on my other edits, let me know and we'll discuss them :)

I reverted your edit because of osm.wiki/Good_practice#Don't_map_historic_events_and_historic_features (the existing remainders are already mapped)

It's been a long time, so I don't remember but I probably added the addresses based on cadastre data. Both are No. 2 according to cadastre, so to differentiate between them, probably one should be 2A

Thank you! :)

Sorry, I mean Malinova dolina

As you can see, my surveys are slowly moving south through Studentski grad, so I hope to soon reach Manastirski livadi and check completion of buildings there. If you want you could wait for that.

So which business did the pastry shop replace? In that building there are 4 shop spaces, until recently occupied by Pavillion24, a shoemaker, a watchmaker, and a fireplace shop. In the next building is Promarket supermarket. Where is the new pastry shop?

It doesn't block the recycling quest in SC...
There are a couple of those in Studentski grad too

Like so many times before, you made a complete mess out of your edits and I'm getting so sick of repairing the damage that I'm considering to ask for a ban of your account.
- You added a new shop node at almost exactly the location of an already existing shop (a watchmaker). If the new shop replaces the old one, please update the tags of the existing shop node instead of creating a new one.
- you added address tags while the node is inside a building that already has address tags. Please don't add address tags unless the address is different from that of the building, and if so, use the spelling of the nearby street in Cyrillic. There is usually no need to add anything but the street name and house number because software can determine the rest.
- Please check the format of the opening hours here opening_hours=* You failed to include a ; to separate the day ranges
- this time you got the phone number format right! It should always start with +359 for Bulgaria

Hi, please consider if Баничарница is really the name of the shop, and not a description of it. I think I would tag it with noname=yes + description=Баничарница Unfortunately we don't have a better tag than shop=bakery for something as special as a Баничарница
See osm.wiki/Names#Names_are_not_for_descriptions and https://community.openstreetmap.org/t/topic/134467/2

osm.wiki/Changeset#Geographical_size_of_changesets

The difference is small, but iD makes teh difference between "Managed Forest" (landuse=forest) and "Natural Wood" (natural=wood) Borisova Gradina is definitely not natural (all trees are planted) and managed (fallen trees on paths are removed). It's not something I want to spend much time on though...

You added a lot of individual trees around the new CSKA stadium. To me it looks like a small forest that I would have mapped with as an area with landuse=forest (a managed forest, so not natural=wood). Why didn't you?

Unfortunately there are many bad examples, so it's not unusual to doit like you did. I want to start a thread about it on the Bulgaria forum

Thank you for adding so many street names to the map of Sofia! However, please note that we have a tag int_name= to add names transliterated from Cyrillic to Latin script. Unfortunately it's not as easily available in iD as name:en= but strictly speaking a transliterated name is not in the English language but still in Bulgarian (just using a different script). Could you please use int_name= for transliterated names?
Please also consult highway=residential and service=driveway

Are you sure it's access=no and not access=private? There must be a reason why that road is there...

One of the service roads you added goes right through a building under construction. Didn't you notice? It looks like the building shape is wrong so I will edit it.

Hi, thanks for editing the map of Sofia. However I reverted your edit because there is consensus in the Bulgarian OSM community to not include улица (street) in street names. See here osm.wiki/Bg:WikiProject_Bulgaria#%D0%98%D0%BC%D0%B5%D0%BD%D0%B0_%D0%BD%D0%B0_%D1%83%D0%BB%D0%B8%D1%86%D0%B8_%D0%B8_%D0%B1%D1%83%D0%BB%D0%B5%D0%B2%D0%B0%D1%80%D0%B4%D0%B8

Thanks! For aligning paths, you could use Strava heatmap, see osm.wiki/Strava#Global_Heatmap_in_High_Resolution
I had a quick look and it seems there's some more work to be done in this area ;)

I went to have a look and adjusted the smoothness values to what I usually tag in the area, see changeset/177960993
The new path pavements around the mathematics faculty are very well made, so to the workmen that made them I'd say that they did an excellent job. But that doesn't mean that smoothness=excellent, for that it would be so smooth that rollerskaters would love to use it. Compare it with the surface right in front of the main entrance (upper end of the steps) or the wheelchair ramp at the back entrance. That's smoothness=excellent!
For the pavements along J. Bouchier I was in doubt to tag them intermediate or bad, because if I would drive on it, I wouldn't slow down much: there's very little risk I would do some damage to my car. Smoothness is for wheeled vehicles, so judging it as a pedestrian is not appropriate. But as a pedestrian, I would say smoothness=intermediate means "watch your step because you might stumble on a raised edge" and smoothness=bad means "watch your step because you might strain an ankle". Because it was smoothness=bad before, I chose that.
See also https://community.openstreetmap.org/t/how-to-map-key-smoothness/109860/180