Estonians 4th best in the world in English as a second language

[Permafrost]

I noticed one Estonian member on this forum being very proficient in English, especially when it comes to the usage of the adverb 'thus'

[Armand_Duval]

Mexico shows in the low proficiency section, but I think Mexico should be in the very low proficiency instead.

My english is quite good but I woudnt consider myself in the very high proficiency level, I'd place myself in the high proficiency section as much, and based in my knowledge, I have met very few mexicans with high proficiency english skills to be honest.