I prefer English menu in device!
But if I choose English text in menu setting I lack the possibility of searching by Ukrainian. Only setting Ukrainian text in menu do it. No problem for me but I want see my-edition version of English on screen. I know the one way to resolve this problem it is edit uk_UA.glx files. I replace all content uk_UA.glx on copy obtained from English glx file but do not change header:

<catalog codepage="utf-8" direction="0" display_name="Українська English"
file_version="3.50" language="uk_UA" pnumber="006-D3318-00">

Note - Українська English - I make for my visual confirmation.

It is work. I have full search by Ukrainian with English interface if I would choose Українська English in menu. But I lack Ukrainian interface and so I receive deprivation of civil rights to drink Gorilka - Ukrainian vodka.

I think this problem concerning all not Latin languages - Greek, Bulgarian and others. For example, if you use Russian interface you do not have cyrillic in Bulgarian for search if you did not change interface to Bulgarian.

Any suggestions about this problem???