We have a multilingual site with about 30 different locales and about 5 pages of content for each. We're using Craft as a content API for the editors to manage content.
Some of those locales share the same language - for example there's USA (English), Singapore (English) and UK (English).
It's a big hassle for them to have to copy the English text into 3 different localisations.
So I'd like to add a custom field at the top of each entry edit page to say "Inherit from another locale?" and provide a dropdown list of all the locales which are currently available and enabled in Craft.
Should this be possible? Does anyone have any code samples of this being done? Is it likely to present any issues if we attempt to do this.