[kartu]

DrunkenDonkey

Will it be possible to use these goodies without actually switching to russian interface?

I was afraid you were going to ask this...
No, at the moment you could customize it only using beta test pack, or harnessing PRS+ build tool (which isn't hard to use) and creating your own custom version of it.

You need to edit the following values:

Spoiler:

 CUSTOM_SORT: true,
                TITLE_1: "0-9",
                CRITERION_1: "0123456789",
                TITLE_2: "А Б В Г",
                CRITERION_2: "АБВГабвг",
                TITLE_3: "Д Е Ж З",
                CRITERION_3: "ДЕЖЗдежз",
                TITLE_4: "И Й К Л",
                CRITERION_4: "ИЙКЛийкл",
                TITLE_5: "М Н О П",
                CRITERION_5: "МНОПмноп",
                TITLE_6: "Р С Т У",
                CRITERION_6: "РСТУрсту",
                TITLE_7: "Ф Х Ц Ч",
                CRITERION_7: "ФХЦЧфхцч",
                TITLE_8: "Ш Щ Ы",
                CRITERION_8: "ШЩЫшщы",
                TITLE_9: "Э Ю Я",
                CRITERION_9: "ЭЮЯэюя",
                TITLE_0: "Прочие",
                CRITERION_0: "",

English JS doesn't have them at all (it doesn't have any "Sony" part of localization, as it's already localized), but you could use Sample.js, which has all English strings.