Aliasing multicoloured_eyes → multicolored_eyes
Link to alias

Reason:

Consistency, coloured is aliased to colored.

I've also noticed that a number of other tags that include 'color' lack an alias for the alternate spelling. I know it would be a fair bit of work, but the alternate spelling of these tags should be aliased for the sake of consistency. It's quite annoying to have used coloured without any issues, yet to be unable to use other tags that use the same spelling of 'colour'.