Spanish is the happiest language

So it seems that we tend to use more positive words than negative ones in our language. Not only Spanish, as the title of this entry says, but in general. The thing is that Spanish people tend to use more positive words than the rest of people. Or so they say in this article. They say “The words of natural human language possess a universal positivity bias”. It seems that Spanish speaking people tend to be more positive than other people. 

It surprised me that the word gift has a negative meaning in German. I guess they are just thinking about giving something and not receiving, or, who knows? What can you expect from people that have the word Schadenfreude, which means the pleasure derived from the misfortunes of others? 

So, why is Spanish somewhat biased towards positive words? I have no answer for that, but I guess it has to be with our openness and the good food, wine

and weather. What do you think?