emigration

"Fewer people are now leaving Moldova, but emigration is still high."

"Ultimately, this emigration from France constitutes a real brain-drain, as it is primarily highly educated French Muslims who decide to leave," he says.

Around 30% of Portuguese aged between 15 and 39 - about 850,000 people - now live abroad, according to data from the country's Emigration Observatory.

The organisation Llwyddo'n Lleol is working alongside councils to address emigration from these areas, which it says is a major cause of language decline.

Small changes to assumptions about emigration, for example, could mean the planned additional tightening of the plan could raise very little.