Thank you, that satisfies my "curiosity".
I am hesitant to speak for Kostya, but I suspect the rest of the new strings in that post are still needed in Portuguese (So that other Portuguese users could appreciate them
):
<!-- strings_access.xml -->
<string name="access_undo">Undo</string>
<string name="access_tap_to_undo">%1$s: Undo</string>
<string name="access_undone">Undone: %1$s</string>
<!-- strings__global.xml -->
<plurals name="undo_title_move_to_deleted">
<item quantity="one">%1$d message moved to Deleted</item>
<item quantity="other">%1$d messages moved to Deleted</item>
</plurals>
<plurals name="undo_title_move_to_spam">
<item quantity="one">%1$d message moved to Spam</item>
<item quantity="other">%1$d messages moved to Spam</item>
</plurals>
<plurals name="undo_title_move_to_archive">
<item quantity="one">%1$d message archived</item>
<item quantity="other">%1$d messages archived</item>
</plurals>
<plurals name="undo_title_move_restore">
<item quantity="one">%1$d message restored</item>
<item quantity="other">%1$d messages restored</item>
</plurals>
<plurals name="undo_title_move_to_folder">
<item quantity="one">%1$d message moved to %2$s</item>
<item quantity="other">%1$d messages moved to %2$s</item>
</plurals>
<plurals name="undo_title_hide">
<item quantity="one">%1$d message hidden</item>
<item quantity="other">%1$d messages hidden</item>
</plurals>
<plurals name="undo_title_delete">
<item quantity="one">%1$d message permanently deleted</item>
<item quantity="other">%1$d messages permanently deleted</item>
</plurals>
<plurals name="undo_title_smart_delete">
<item quantity="one">%1$d message deleted</item>
<item quantity="other">%1$d messages deleted</item>
</plurals>
<!-- strings_prefs.xml -->
<string name="prefs_category_confirm_undo">Confirmations and undo</string>
<string name="prefs_ui_use_undo">Enable Undo</string>
<string name="prefs_ui_use_undo_summary">Skip confirmations and enable Undo instead</string>
<string name="prefs_threaded_reverse_children">Reverse when expanded</string>
<string name="prefs_threaded_reverse_children_summary">Reverse the order of expanded messages, from older to newer</string>