Today I revised some lessons in English and I listened to a video in eEnglish.

If there's a noun following "some," it's always plural.
We always capitalize the names of languages.

In the afternoon I read a some page in Spanish.

or,

In the afternoon I read some pages in Spanish.

Today I revised some lesson in English and I listened to a video in english.

I just want to add to what others have said here: Use of the word "revise" to describe the act of reviewing something is correct British English. In American English though, we only use "revise" to mean "make changes" or "edit."

In the afternoon I read a some pages in Spanish.

Today I revisewed some lesson in EnglishEnglish lessons and I listened to a video in eEnglish.

You *can* say "I revised some English lessons" as well, but it's not necessarily how a native speaker would put it

In the afternoon I read a some pages in Spanish.

Today I revisited some lesson in Englishs and I listened to a video in eEnglish.

If you actually revised a lesson(edited a lesson) then you would say something like "I revised a lesson"

In theThat afternoon, I read a some pages in Spanish.

It would be better to include what you read from, eg. book, magazine, etc.