Re: They got agreement on this?
Until late in the nineteenth century French was actually a 'minority language' in France itself -- it had more speakers than any other of the languages within the geographical area, but fewer when these languages were aggregated. It took a massive -- taxpayer financed -- effort by central government to bring about the current hegemonic status of French. Similarly in Wales large sums of taxpayers' money was employed to promote the English language. Now that there is a little redistributive justice there's a surprising amount of bleating about the alleged costs of this -- often, in my experience, from those of an UKIPish disposition.
PS Students of language have a good joke 'What's the technical term for someone who can speak only one language?' 'English'.