I don’t think it’s etymology and irregularity that make English “fun”; I think that it’s English’s large number of concepts because we freely appropriate words and their ideas from other languages (“schadenfreude”, “Deja vu”, etc), the small alphabet, the lack of diacritics, and the flexibility that has been forced onto it primarily by American speakers abusing grammar- verbification, etc.

I think that simplified English is the most likely candidate for a universal human language. The “Unicode of languages”, if you will.