| Subject | English | Russian |
| ling. | fail to differentiate unstressed vowels | акать (Anglophile) |
| ling. | failure to differentiate unstressed back vowel-sounds | аканье (Anglophile) |
| gram. | unstressed vowel | безударный гласный (ssn) |
| gram. | unstressed vowels | безударные гласные (Unstressed y, ю, и and ы ssn) |