Buttons text not translated automatically

Good morning.

Some texts from the form 7 aren’t being translated automatically even having installed and in use the proper e latest language pack in the site.
I’m sending you an example where the main language pack is Portuguese (Brazil) and the “Search/Browse” button plus the additional text “No file selected” aren’t translated.
From the documentation of the plugin they should be automatically translated right? If not, can you share the link where I can learn how to translate them?

Thanks

The page I need help with: [log in to see the link]