Sitecore Powershell Extensions is a great way of changing a lot of items in bulk, giving your content editors a lot of power. Unfortunately, the tool is only available in English, confusing people using non-English sites by inserting blank titles in the Start Menu and Content Editor context menu.

This isn’t difficult to fix, though. Translate the following items to your language of choice:
- All four applications under:
core:/sitecore/content/Applications/PowerShell/PowerShellIsecore:/sitecore/content/Applications/PowerShell/PowerShellListViewcore:/sitecore/content/Applications/PowerShell/PowerShell Consolecore:/sitecore/content/Applications/PowerShell/PowerShell Runner
- All Ribbons, buttons and menus under::
core:/sitecore/content/Applications/PowerShell/PowerShellIsecore:/sitecore/content/Applications/PowerShell/PowerShellListView
- The three items in the content editor context menu:
core:/sitecore/content/Applications/Content Editor/Context Menues/Default/Edit Scriptcore:/sitecore/content/Applications/Content Editor/Context Menues/Default/PowerShell Consolecore:/sitecore/content/Applications/Content Editor/Context Menues/Default/Context PowerShell Scripts
- The five items in the Start Menu:
core:/sitecore/content/Documents and settings/All users/Start menu/Right/PowerShell Consolecore:/sitecore/content/Documents and settings/All users/Start menu/Right/PowerShell Toolboxcore:/sitecore/content/Documents and settings/All users/Start menu/Right/Development Tools/PowerShell ISEcore:/sitecore/content/Documents and settings/All users/Start menu/Right/Reporting Tools/PowerShell Reportscore:/sitecore/content/Documents and settings/All users/Start menu/Right/Reporting Tools/PowerShell Reports/PowerShell Fake Report
- The Launch Pad button at:
core:/sitecore/client/Applications/Launchpad/PageSettings/Buttons/ContentEditing/PowerShell ISE
Fill the Text, Display Name and/or Tooltip properties, depending on the English language version.

Using these guidelines, some translations are done twice. For example, the application PowerShell ISE and the Start Menu item PowerShell ISE. Can’t hurt to be thorough, though.
Also, be sure to translate the fonts at master:/sitecore/system/Modules/PowerShell/Fonts, or your ISE will show in font Monaco.
Good luck!
(Edit July 21, 2016: Added several items to translated)