Hello! Please have a look on osm.org/node/13038890711. What ist the mean of the tag "e=" = "reservoir"?

Hello! Please have a look on osm.org/node/13039716094. What is the mean of the tag FAMILAR = 55?
Please notice the use british english for the keys.

Hello! Please have alook on osm.org/way/1418970092. What is the mean of the tags
aktualit = 2022-12-13
fktkurz = 51009_1610
funktion = Überdachung
gebnutzbez = Sonstiges Bauwerk Oder Sonstige Einrichtung
oid = DEBWL001000dgbrWBL?
(no other OSM keys)

Hello! Please have a look on https://overpass-turbo.eu/s/299Z. What ist the mean of the tag Grosseto = 2?

Since Wikipedia has its own links between the different languages for an object, it is not necessary to list all of them in OSM. One version is sufficient.

Hello! Please have a look on osm.org/relation/9964465. What is the mean of W = yes?

Hello! Please have a look on osm.org/node/8234695347. What is the mean of the tag diease:clas = 1? Is there any difference to diease:class?
Please notice also the date format for survey:date = 2025-07-31 (YYYY-MM-DD) instead of survey:date = 20250731

Welcome to OSM!
Please have a look on https://overpass-turbo.eu/s/299F. What is the mean of the tags
Calle: = Las Acacias
Tipo = BRAZO
lampara = Vapor de sodio
?
Please notice also the difference between name and ref!
You add also 6 node with Calle instead of Calle:.

Hello! You have added the keys :stop_id, :stop_name to all four nodes. Which prefix did you miss?

Welcome to OSM! Please be careful. You moved two street nodes more than 100 meters crossing other streets and buildings. I moved this booth nodes back to the original position. Please check the area for other wrong positioning.

Hello! Please have a look on osm.org/relation/13834231,https://www.osm.org/relation/15031205,https://www.osm.org/relation/15031207.You have deleted some of your items.