Oh yeah, I studied Latin American Spanish so I did forget that Spaniards do have these sounds. But the vowel number is clearly smaller. The hardest sound is pro

Oh yeah, I studied Latin American Spanish so I did forget that Spaniards do have these sounds. But the vowel number is clearly smaller. The hardest sound is probably the "rr" rolling r In English it's probably distinguishing between a number of vowels like BAD/BED or PULL/POOL, and words like STRENGTH that really test the limits of Mandarin speakers