She’s spoken normally when writing or reading aloud a few times before. Closest example to pop in my head is here: https://selkiecomic.com/comic/selkie455/ ‎Note how she writes the words in normal-singular.
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Snip snip -EDIT- Patch log 31Dec2018: Fixed an issue with the voice pack implementation. Avery no longer sounds like a little girl, and Selkie no longer sounds like a middle-aged man.
Today's edition of the Secret Commentary is empty, because Dave failed to come up with something for it.