In the spirit of nostalgia and introducing you to some of my personal favorites, here are some examples.
(Links lead to videos, I hate embedding them)
(Also, obviously, these are not all 90's shows. They were just played a lot in the 90's.)
Once upon a time: Life (French-Japanese)
The Wonderful Adventures of Nils Holgersson (Swedish-Japanese)
The Moomins (Swedish-Finnish-Japanese-Dutch)
Based on children's books by Swedish-Finnish author Tove Jansson, the Moomin films and TV show follow the life of a family of trolls (although most people thought they were white hippos) and their weird, magical friends as they go on many adventures. It's the most strange and adorable thing you have ever seen. You're welcome.
The Smurfs (Belgian)
I don't have to introduce them to anyone, so I'll just stop for a second and say that the 3D Smurfs movies were an absolute travesty and they should be all buried six feet deep and forgotten forever. Ugh. Moving on.
Spartakus and the Sun Beneath the Sea [played in Hungarian as "Sunken Worlds"] (French)
Okay, so I only vaguely remember this one because it is as old as I am, but the music will never ever get out of your head. It is a strange sci-fi-fantasy series involving a lost civilization living inside the Earth and a pair of Earth children traveling with a bunch of even stranger companions to visit and save it. Or something along those lines. From what I remember, it was prime material for driving my parents crazy.
(This list is by far not complete. I'll write more later)