[balboah]

I’m Swedish, didn’t quite get the part about J and Y being pronounced the same? Sounds different to me

[einr]

I think he's talking about Y when used as a consonant at the start of English words. Y exists in Swedish as a distinct vowel sound but is not used as a consonant like in English.

Swedes tend to pronounce English "yes" and "yoke" as well as "juice" and "joke" all with the same Swedish J sound.