Because I’m more of a folklore and myth fan than modern fantasy fan I had no idea kobolds are usually depicted as lizards in the West and dogs in the East.
I’ve read up on why (in the original dnd manual kobolds looked like weird lizard dog people and afterwards some creators focused more on the lizard aspects while others focused more on the dog aspect, which resulted in some creators depicting them as any random animal they like) but in folklore kobolds are literally just the German version of gnomes, or the Scandinavian nisse/tomte.
They are both small and dress like the peasant class of their respective countries, they both have the ability to transform into animals and inanimate objects, though they tend to change back pretty quickly suggesting they don’t have the “stamina” to keep the illusion up for long, they act as house helpers and protectors but will turn nasty if disrespected sometimes going so far as to burn the whole house down, and they also work on ships both as helpers and bad omens. The ship thing overlaps so much that if you look up ship kobold or ship gnome (skibsnisse) you get the same pictures.
The only big difference I could find is that folklore kobolds are also known to work in mines, though I wouldn’t be surprised if you get some mine nisse/tomte in Norway or Sweden that I just haven’t come across yet. The Danish nisse variant is also known to have a wide variety of jobs like farmer, church helper, scribe and miller.
My general impression is that folklore kobolds are sliiightly meaner gnomes but not by much, so while I’d never tell fantasy kobold fans to change anything about their beloved creature, if I were ever to make a fantasy world I’d depict them as the bad boy relative of the nisses who are very close knit with humans, even living with them, while kobolts prefer more unsavory or unrefined humans and naturally encountering dwarfs more often in the mines, and have tomtes live in nature with more close relations to wild animals but still relatively close to humans and put them all under the species of gnome.
Another one of the many, many, MANY instances where D&D literaly changes the world's perception of a piece of folklore.
Seriously the amount of "folklore" and "legend" stuff in fiction today that comes JUST from D&D tells a lot about how, for example, there's a big Americanization of media, and how a lot of people rely on modern fiction to tell legends rather than study old sources, traditional art, or folklore analysis.
My understanding is that Kobold is literally etymologically the same word as Goblin through a different language?
Growing up in Austria (and therefore lot's of German media) I have understood the cultural meaning of the word "Kobold" to be more like "Gnome", but CAN also mean "Goblin", if in a more D&D or Fantasy related setting. It IS more close to the gnome tho, etymologically. And yeah, the "Klabautermann" is really a "Schiffskobold"/"skibsnisse", OP.