Adding translations into config.xml breaks installer's translation

I'm trying to add custom translations(Russian) for the installer's default pages(inside the controlscript.qs).

When I add translation into config.xml and then run the generated installer it is not translated at all. I mean it's completely in English, default Russian translation is not loaded too.

I tried many ways to add the translations, according to the information from documentation and in the internet(none of them helped). Here are three of them:

1)  Tried to add translations directly to the config folder

project

    |-config

        |- config.xml

        |- controlscript.qs

        |- du_ru_RU.ts

        |- du_ru_RU.qm

    |- packages

        | -...

2) Tried to add resource file and use it in binarycreator(via -r)

project

    |-config

        |- config.xml

        |- controlscript.qs

    |- resources

        |- additional.qrc(added link to du_ru_RU.qm with `/` and `/translations` as prefix)

        |- du_ru_RU.ts

        |- du_ru_RU.qm

    |- packages

        | - ...

3) Tried to combine 2 and 3

I'm adding the translation into config.xml as a language code(as I found in documentation). I also tried adding it as filename/filepath and it doesn't work too.

Attached some logs. As I can see my translation file is not loaded at all. But there are no errors.