It was a big problem for our old controllers in 2008 to meet 4th level requirements. They needed just elementary english knowledge during soviet times - in every ATC center we had an interpreter))), that time the english-speaking traffic was just 0,5% of total.
But...in one of the most corrupted European countries, u can get the certificate for money (prox 300$). I call these guys with a fake 4th level "Say-agains". Guess why)