We don’t really like one-syllable words in Swedish, so if they’re used often, we try to make them two syllables instead. ;) Hej hej, tack tack, ja ja, nej nej. Also if a person’s name is one syllable, it is very often made into two as a nickname: Lars → Lasse, Karl → Kalle, Tom → Tompa etc.
Yeah, you're not wrong. The French call the letter 'Y' the Greek 'I'.
Someone speaks, but someone does speak. The verb "does" is conjugated for 3rd person singular, so the bare infinitive "to speak" without the "to" is used.The Swedish voice is not monotone, so I did use an exclamation point, but some voices do get more excited than that.