My mother language is Arab,and i am a native arabic and very good speaker in Turkish even more than in English :):)

My mother tongue is Cantonese. Maybe I grow up in China,so I think Chinese is not too difficult to pronounce.But my friend said French isn't easy to pronounce.

I think Romance languages are easy to pronounce personally. Though tonal languages are very easy for me because I speak 2 very tonal languages. Though Japanese and Korean are very easy because they aren't any tones. My mother tounge(s) are English, Mandarin Chinese and Cantonese.

I am bilingual in English and Lithuanian, so both languages are easy for pronunciation.

my mother tongue is italian and i think german and spanish are easier to pronunce for me.