> This is as much of a copyright violation as the LLM training process.

Not necessarily. This could be considered a quotation of a trivial part of a larger work, making the use legal in the US under its fair use doctrine.

Additionally, I'm not aware of any obvious way that this use could harm the commercial market for Warcraft 3 (and the other games whose voice packs are included in this repository). The use here does not compete with the original, and if anything it might drive sales on the margin through nostalgic reminders.