Interesting charts from the folk at (the anglocentric) Move Hub:
“This map shows the second most common first language in (nearly) every country in the world. These are people who speak it as a first language, we decided this was a more revealing metric as it illuminates the ancient furrows of conquest, colonisation and recent immigration trends (see Polish in the UK).
English takes the crown as the most common second language around the world with 55 countries speaking it as a second language. France and Russia are second and third with 14 and 13 respectively.”
The individual maps of course apply to nation-states only and some of the conclusions are open to interpretation. The second most spoken language in Wales is Welsh, and taking “England & Wales” as one legal territory that is still the case. The definition of “spoken” is a debatable one, especially in the case of countries in Scandinavia where English fluency is common, though that is hardly an indicator of it being a “second most common first language”. The number of people stating an ability to speak Irish in the 2011 Census of Ireland was as follows:
187,827 people spoke Irish on a daily and weekly basis.
613,236 people spoke Irish less than weekly.
976,374 people spoke Irish but not on a regular basis.
1,777,437 people in total stated an ability to speak Irish or over 41% of the population.
119,526 people stated an ability speak Polish (that number has fallen since it was recorded in 2011).