Comment 8 for bug 44907

[update-manager]
- "Software Preferences"
   Located in: ../data/SoftwareProperties.glade.h:13
   Should be changed, it matches with the title of the window

- "Software Properties"
   Located in: ../data/software-properties.desktop.in.h:2
   Must be changed since this is very confusing (not explicite)
   It matches with the menu items (System > Administration)

- "Some third party entries in your souces.list where disabled. You can re-enable them after the upgrade with the 'software-properties' tool or with synaptic."
   Located in: ../DistUpgrade/DistUpgradeControler.py:194
   Reference to the software, must be changed too.

- "<b><big>You must check for updates manually</big></b>↵
↵
Your system does not check for updates automatically. You can configure this behavior in "System" -> "Administration" -> "Software Properties".
   Located in: ../data/UpdateManager.glade.h:1
   Reference to the shortcut, must be changed too.

[ubuntu-docs]/desktopguide
- "Open <menuchoice><guimenu>System</guimenu><guimenuitem>Administration</guimenuitem><guimenuitem>Software Properties</guimenuitem></menuchoice> ."
   Located in: C/add-applications.xml:192(para)
   Reference to the shortcut, must be changed too.
   Moreover, it should be : "[...]</menuchoice>." not "[...]</menuchoice> ."

Hope this is what you need.

P.S. : there should also other strings in other packages such as xubuntu-docs for example but I haven't searched for.