Japanese, Italian, Spanish, and a few other languages have about five to nine distinct vowels. They also have a severe limit on consonant blends and combination

Japanese, Italian, Spanish, and a few other languages have about five to nine distinct vowels. They also have a severe limit on consonant blends and combinations. English has about 25 distinct vowels; it varies depending on your accent. Consonants can be placed around vowels freely without strict rules. There are about 250 distinct syllables in use in Japanese and two or three times that many in Spanish or Italian. English has many thousands. So English is harder, but people learn to speak it. Even babies.