it was created by user Petr Jenč. however I corrected it for you

this was there before me, i welcome you to improve it. you already said what you could improve so you can begin with editing. :)

the name tag was there before me. you linked good practices, but these are just recommendations which can differ depending on situation and region. i cite out of your link "Nobody is forced to obey them". if you know better you are free to correct or improve it instead of just commenting.

the location name must not necessarily in the name tag, what is in wikipedia is secondary, more important is what it is on the sign and on the sign of this museum the name tamezret is not found.

Why did you remove many name:hy, name:ru and name:en tags with this edit?

Here is also a name removed without explanation.

Here again, why do you delete or change the names without moving them to old_name:*?

Why do you delete the street names without explanation? If they are no longer up-to-date, please move these to old_name:* instead of deleting them.

Why do you delete the Armenian names without explanation?

The "name"-tag was already in the way before my edit. I just added the names in other languages. The name-tags were already there and its not in my hand to decide if they should be removed. So you should rather contact the person, who initially added the name-tag to this way. I would not remove them without consent, but if you are in the opinion, they should be removed, you can do this.

The best example is openstreetmap.org. Change the language list of your OSM account to "nl ru" [1. Dutch 2. Russian] (Link: osm.org/preferences) and then you see the name of this municipality in the header in Russian instead of Dutch, because there is no name:nl tag: node/308897364

Some users have a multilingual language list in there browser/system. This can cause the name tag to differ from the specific language.

For example if your device specific language list is 1. Dutch (nl) 2. Russian (ru), it would show the Russian name first, because the name:nl tag is missing, despite being Dutch your primary language. To ensure the Dutch name is shown as primary, the name:nl tag is needed.

Yes, this was intentional. The name tag must be consistent for all languages. name:XY should have the same meaning as the "name" tag, not a different one. The name:pt was not correct, since it only comprised the name of the city, not the whole name of the governorate. You can of cause re-add the name:pt tag if you know the correct, complete name of this governorate in Portuguese.