It's perfectly fine as long as credit remains on the files. I license my stuff this way on purpose because I believe things are made to be shared and remixed, not held onto for what monetary value they may have (I have huge issues with copyright and trademark law as they currently are in the US)
Thanks, that's great! I just wanted to double check that you were okay with me sharing them and that the CC BY 4.0 license was still in effect because as far as I can see this license isn't mentioned in any of the files themselves and you aren't allowing free downloads on itch.io. On the piecepack wiki it looks like I'll need to create new LanguageArabicCategory and LanguageGeorgianCategory tags!