Comment 1 for bug 62764

I have checked the en_GB translation in Rosetta for gcompris and all occurrences of "color" have been translated correctly (to "colour"). So I guess the translation hasn't been released yet (the last edited date is 2006-07-23). The link to the translation is:
 https://launchpad.net/distros/ubuntu/dapper/+source/gcompris/+pots/gcompris/en_GB/+translate
(although you might need to be part of the translation team to see it)

This still leaves the issue of the flag.