I wish I could read your language. But I humbly suggest that: Never mention the superlative degree in general linguistics.

I think that the easiest is your mother tonge and the hardest is the next one if it has a different script. If not, it's relatively easy-going. :)

Creo que entre los más difíciles están los idiomas asiáticos como el chino, el japonés, el hindi (hindú) porque son muy guturales y su escritura imposible ¡jajaja!; los eslávicos como el ruso y el polaco por lo complejo de su fonética que hacen casi imposible pronunciar lo que se lee ;) ; el árabe con su escritura imposible; y quizás el castellano (español) por la complejidad de su gramática.

@ miek Russian is a Slavic language as well :/ no problem with cyrillic symbols since you study them, you told it urself maybe syntetic Grammar is difficult but languages with characters are pain in butt ))

it depends on where you're from, my main language is spanish so languages with similarities i find them easy like italian, french, portuguese, etc slavic languages are not that hard once you learn the new letters but oriental languages and russian because of their writing i often have no clue