Good day everyone. So I'm about to cut to the chase: Is there any word/phrase that you can use to describe the language you're best at that is not your native language? In my case that would be the English language, but, since I do not originally come from an English-speaking country, I cannot call it my native language. I thought 'first language' would work, but after some searching, I've figured out that 'first language' is just a synonym for 'native language', so I can't use that either. Same goes for 'mother tongue'. Is there any word/phrase you know that I can use? I was hoping to write a sentence like "I've lived my entire life here, and that is why the English language has become my _______ language". Thanks in advance.