SlashLanguage

This addon creates a simple slash command ("/lan <message>") which allows you to speak the
text "<message>" to your currently selected chat type (guild, party, etcetera) in your character's
second known language. This allows you to avoid having to use the chat box language selector
to swap spoken language, and allows you to speak in that language for only one message
rather than having the language stick until you swap back to the default.

You can also specify the chat type (and, if necessary, whisper target or channel) to use for a
given message, for use in macros. The syntax to do this is "/lan [chatType target] <message>".
For instance, to send a message to party chat, "/lan [party] <message>". To send a whisper to
someone, "/lan [whisper <player name>] <message>". To send a message to a specific channel,
"/lan [channel <number or name of channel>] <message>". Note that currently, although you
can technically send second-language messages in whispers and channels, they will not be
displayed as such. This is Blizzard's limitation.

For more information, including version history, support information, and other such details, view the
addon's home page here.
However, please download from WoW-Interface if possible, to save my limited bandwidth.