Dear Marianna,
In US I was taught note-names as you noted as a "translation" for the fancier names in English
The names of notes in English in descending order according to note-value are:
Open no stem =whole note
Open note with stem = half-note
black note with stem= quarter-note
black note w/ stem and flag = eighth note (1/8)
black note with stem and two flags = sixteenth note (1/16)
" with three flags= thirty second note (1/32)
" with four flags= sixty-fouth note (1/64)
A dot after a note means to extend the note by half it's value.

Do musicians in Canada, Australia, New Zealand and former British colonial possessions use the hemi, semi, demi names?
wow