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Set UTF-8 encoding in VIM

Edit your .vimrc settings file to include the following line:

set enc=utf-8

And you should be able to edit a UTF-8 file in Windows using gvim.
For Linux, just set the locale to utf-8 such as:

export LANG=en_SG.UTF-8

Source: http://research.mosuma.com/faq/howto/vim-utf8