Locate where to find words fallen through translation

Version 2.3.0.2
Screen print of area in question attached.

I am translating the administration area and have a few words that has fallen through when I gone through file by file.

1. Catalog>products - in the page that appear when clicking the + sign the Attribute is not translated. Which directory do I find the file that containsthe definition of this word?

2. Same question but regards to footer. See attached screen print:

Hi,
You can find 'Attribute' at admin\language\en-gb\en-gb.php.
You can find footer links at Catalog->information in admin section.

Hope it will resolve your issue.