How do I set the UI language in vim?

I saw this on reddit, and it reminded me of one of my vim gripes: It shows the UI in German. Damn you, vim! I want English, but since my OS is set up in German (the standard at our office), I guess vim is actually trying to be helpfull.

What magic incantations must I perform to get vim to switch the UI language? I have tried googling on various occasions, but can't seem to find an answer (No, Google, you're my friend *pat*, *pat*, but I allready know how to change the syntax highlighting, thank you!)...

From stackoverflow Daren Thomas

• Start vim with a changed locale:

  LC_ALL=en_GB.utf-8 vim
  

  Or export that variable per default in your bashrc/profile.

  From Armin Ronacher

• :help language

  :language fr_FR.ISO_8859-1

  From Ken

• As Ken noted, you want the :language command.

  Note that putting this in your .vimrc or .gvimrc won’t help you with the menus in gvim, since their definition is loaded once at startup, very early on, and not re-read again later. So you really do need to set LC_ALL (or more specifically LC_MESSAGES) in your environment – or on non-Unixoid systems (eg. Windows), you can pass the --cmd switch (which executes the given command first thing, as opposed to the -c option):

  gvim --cmd "lang en_US"
  

  As I mentioned, you don’t need to use LC_ALL, which will forcibly switch all aspects of your computing environment. You can do more nuanced stuff. F.ex., my own locale settings look like this:

  LANG=en_US.utf8
  LC_CTYPE=de_DE.utf8
  LC_COLLATE=C
  

  This means I get a largely English system, but with German semantics for letters, except that the default sort order is ASCIIbetical (ie. sort by codepoint, not according to language conventions). You could use a different variation; see man 7 locale for more.

  Daren Thomas : I will have to check this out some more - it is not currently working AFAIR, but will only have access to the machine in question next wednesday. Thank you for your reply.
  From Aristotle Pagaltzis

• Putting this line of code at the top of _vimrc saved my day:

  :set langmenu en_US.UTF-8
  

  Rytmis : Actually that's set langmenu=en_US.UTF-8, at least on my gVim 7.2
  From SeasonedCoder

• For reference, in Windows (7) I just deleted the directory C:\Program Files (x86)\Vim\vim72\lang. That made it fallback to en_US.

  From August Lilleaas