"her auntie is a translator" is informal but is used in English. This answer is marked as incorrect.
A translator and an interpreter aren't exactly the same thing, though. Translation is written, and interpretation is spoken
Can't be sure, but I almost hear an "L" sound between moster and är. Is that a common liaison?
No. For some reason the TTS pronounces it "mostel". Don't know why, but it's wrong.
For me, the speaker in the lesson often speaks very unclearly, although I'm not sure that it's text-to-speech. The speaker in these discussions speaks very clearly, either really really good text-to-speech, or an actual recording of a human. I wish there was a way to get the clear speech in the lesson itself.
There may be no connection, but the word "interpreter" kind of contains the word "pratar," which is, as those reading this know, the Swedish word for "to speak."