It's not that simple. Language difficulty isn't just about familiarity of vocabulary but also complexity of grammar. Some languages are just easier to learn reg

It's not that simple. Language difficulty isn't just about familiarity of vocabulary but also complexity of grammar. Some languages are just easier to learn regardless of shared vocabulary. Indonesian and Swahili, despite not having much shared vocabulary with Western languages, are well known to be among the easiest of natural languages to learn. I'm a native English speaker and have studied French, Spanish, German, Indonesian, Esperanto, and Mandarin and found Esperanto and Indonesian by far the easiest despite German (and maybe French due to the Norman Conquest) being both closer to English.