[Q] Control letters in Contacts alphabetic scroll? - Optimus One, P500, V General

I'm using both English and Russian letters when naming my contacts. With the default V10d (ARUSSV) firmware my contacts are looking like this (when scrolling):
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
The English letters come first, then there are all of the available Russian letters.
But after flashing the Prime v2 or Megatron v1 firmwares all of the Russian letters are disappearing when scrolling contacts: there are only English letters.
It is interesting, that I'm able to bring the Russian letters back in Prime/Megatron just by setting the overall phone language to Russian (instead of English). When phone is set to Russian language Russian letters comes first in the scroll list and the remaining English letters are at the bottom of the list. When I set overall language back to English the Russian letters disappear from the list.
When using the default firmware I can see both Russian and English letters when scrolling Contacts independently of the overall language used.
So, there is a questions: if there is a way to control the appearance of alphabetical letters in Contacts scroll list?
Thank you!..