I recently worked translating the Manual.english.php file of SMF 1.1 RC2 for Greek language under the surveillance of spiros.
There were
some strings that could not be found and be translated in addition to what Zaenal Mutaqin reported. They are
direct strings in Help.template.php. I found this topic by searching so I add this catalog. There might be some more, as I haven' t worked on Help.english.php and of course something might be surpassed by error.

Direct strings in “Help.template.php”Line 744 “Login”
Line 778 “Login”
Line 2013 - 2025 SMF - Bulletin - Board – Code (in table formation)
Line 2057 “Code”
Line 2071 “Quote”
Line 2083 “Quote from: author”
Line 2214 “profile”
Line 2217 “The Registration Screen”
Line 2219 “How to Register”