I think the Netherlands has the highest amount of L2 English speakers.
In the Netherlands, the English language can be spoken by the vast majority of the population, with estimates of English proficiency reaching 90%[1] to 97%[2] of the Dutch population.
I think the Netherlands has the highest amount of L2 English speakers.
https://en.wikipedia.org/wiki/English_language_in_the_Netherlands
It’s not the official language though so all documents and legal stuff would be in Dutch.
100% of Irish people can speak English and do so without sounding as ridiculous as the Dutch do.