I don't know if you've read other posts about the difference between "many" and "some", there is plenty. Many and several may seem the same, but actually have completely different Swedish words, "many" is "manga" and several is "flera".“Several” is used to mean more than “some” but less than “many.” The dictionary says it means more than a few but not a great number.

From what I've read, in English, technically "several" is between "some", and "many". Though I tend to think of them synonymously.

Yea, the voice does that. What I was taught in school (Finland) was that "de" is the official/formal form and "dom" is a colloquial/informal form. Mixing the written and the spoken is what threw me off early on in this course but I got used to it.

Septimus is right. Moreover, in Finland "de" is pronounced as "di".

I hear dom, too. or the French "de"

dom is by far the most common pronunciation.