Comment 6 for bug 37138

Here is a working setup for English in location Finland. In my tests I have not seen a word of Finnish, so I think it is quite possible to use Finnish localization with English without mixing languages.

Many of these are required for computer to work normally, as described above. I also found out that using "LC_TIME=en_US.UTF-8", week numbers are different from (ISO-8601 standard) weeks used in Finland.

/etc/locale.gen
fi_FI.UTF-8 UTF-8
en_DK.UTF-8 UTF-8

$ sudo locale-gen

/etc/environment
LANG=en_DK.UTF-8"
LC_CTYPE=fi_FI.UTF-8"
LC_NUMERIC=fi_FI.UTF-8"
LC_TIME=en_DK.UTF-8"
LC_COLLATE=fi_FI.UTF-8"
LC_MONETARY=fi_FI.UTF-8"
LC_MESSAGES=en_DK.UTF-8"
LC_PAPER=fi_FI.UTF-8"
LC_NAME=fi_FI.UTF-8
LC_ADDRESS=fi_FI.UTF-8
LC_TELEPHONE=fi_FI.UTF-8
LC_MEASUREMENT=fi_FI.UTF-8"
LC_IDENTIFICATION="en_DK.UTF-8" "

Details on English in Finland and a cfeninge configuration script
http://www.iki.fi/karvinen/english_in_finland_on_ubuntu.html