i18n: merge with main
This includes four i18n changesets transplanted from the default
branch to the stable branch since they were made after the freeze.
i18n-ru: tranlated docstrings from filesets added in
1575dc5d399a
i18n-pt_BR: synchronized with
94eea58da2a3
i18n-ru: tranlated docstrings from filesets added in
1575dc5d399a