Of course these two creatures have become different names in the different countries, though they sound much alike here and there. Below a complete view.

Country

dormouse

Means/
related to

leafy

Means/
related to

Brazil
Denmark
Germany
Finland
France
Israel
Italy
Mexico
Netherlands
 
Norway
Poland
 
Portugal
 
Spain

ghiro
syvsover
siebenschläfer
murmeli
le loir
marmita
ghiro
ghiro
eky
 
ekorn
popielica
 
kiko
 
liron

dormouse
dormouse
dormouse
dormouse
dormouse
dormouse
dormouse
dormouse
short name
for squirrel
squirrel
greyish (though it's brown
and white; female) 
named after Blooms
rabbit, Winx
dormouse

lattuga
skalde
lattich
vihannes
laitue
tzabi
lattuga
lechuga
gompie
 
salatus
lilit
 
alface
 
lechuga

lettuce
boldhead
kind of moor flower
grocery
lettuce
turtle
lettuce
lettuce
proper name
 
salad
lily
 
lettuce
 
lettuce

Qualities.

Leafy: A peaceful animal with which Irma shares her little secrets. Despite his simple appearance he has a character. Irma found him thanks to following a trail of puddles leading to Mr. Olsen's pet shop.
With help of Hay Lin his aquarium has turned into a tropical island.


† Dormouse: Will adopted him after he was taken out of its hibernation by Uriah. He behaves himself like a voracious wild monkey, but he brings comfort to Will too during bad times. He uses Will's cuddly frogs as toys.
In a critical moment he saved his master's life by biting firmly in Cedric's tail.
He died after being hit by a car.

Napoleon: In hopes of bringing comfort after the loss of Caleb Will gave him as a present to Cornelia. Initially the latter didn't accept the cat, letting Lilian taking care for him. It was Lilian who gave him its name. After she saw Napoleon protecting Caleb against a raven Cornelia accepted him. His sixth sense protects Cornelia from closing danger.

We (pronounciation: wee): A small Basiliadanean creature which went as a stowaway to Kandrakar with the Oracle. We is a bipedal creature with a head which is about as large as its body and limbs together, and a bit smaller than its tail. The tail has red and blue stripes and keeps being seen when We makes himself invisible. We carries his belongings in a small trunk, and those are often larger than the trunk itself.
Because of his behaviour We couldn't be kept in Kandrakar, so the Oracle gave him to Orube to comfort her loneliness. Unfortunately she's allergic to his fur.