It's a horrible name to pronounce for many non-English speakers.
According to the readme, “jj” was chosen because it was easy to type, and a name was found to fit that.
Really?
The wiki audio sample[1] seems fairly close to how people in the US pronounce the word, just with a more emphasized first syllable.
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1. https://upload.wikimedia.org/wikipedia/commons/f/f1/Ja-Jujut...
Ambiguous romanization is weird, I wish romanization rules would just follow IME rules (except in the case of consecutive n's, that'd look weird).
That's kind of tautological ...
However, yes, that is certainly true. Japanese has a pitch accent rather than a stress accent and all syllables are roughly the same length. English speakers don't tend to talk that way.