> This PR:
>
> - makes GUI error messages bilingual: user's native language + untranslated (i.e. English)
> - insures that only untranslated messages are written to the debug log file and to stderr (that is not the case on master).
Backport of Core PR16224 - part 2 of 5
https://github.com/bitcoin/bitcoin/pull/16224/commits/917ca93553917251e0fd59717a347c63cdfd8a14