> I've occasionally heard that Swedish is the closest in simplicity
Speaking English and Swedish fluently, I'd say Swedish (and Danish/Norwegian) is simpler grammatically, as it just has the one conjugation per tense regardless of the personal pronoun: I are, you are, we are (är). I were, she were, you were, we were (var). This is why you'll hear Swedes/Scandinavians make typical mistakes like "we was".
As an aside, it also seems to me like Swedish culture is more monolithic/conformist and contains a small set of really common idioms and phrases that get you a long way towards being conversational. It shares that aspect with Dutch as spoken in the Netherlands, as opposed to Dutch in Belgium.
> English became the modern lingua franca
As a second language speaker, I can't help but think poor English is the lingua franca. Not to mention lots of couleur locale in the form of accents.
Speaking English and Swedish fluently, I'd say Swedish (and Danish/Norwegian) is simpler grammatically, as it just has the one conjugation per tense regardless of the personal pronoun: I are, you are, we are (är). I were, she were, you were, we were (var). This is why you'll hear Swedes/Scandinavians make typical mistakes like "we was".
As an aside, it also seems to me like Swedish culture is more monolithic/conformist and contains a small set of really common idioms and phrases that get you a long way towards being conversational. It shares that aspect with Dutch as spoken in the Netherlands, as opposed to Dutch in Belgium.
> English became the modern lingua franca
As a second language speaker, I can't help but think poor English is the lingua franca. Not to mention lots of couleur locale in the form of accents.