I have seen this in EPS files in the past. Old EPS files. Without anything selected, I just changed the names. Looks like they are Pantone names that got munged up.
Take care, Mike
The font looks fine for your palette, you have just encountered some swatches from someone using a OS different than English. Just use the command to select unused colors adn delte, or change the names if they are used. If the colros keep coming back look into a post deleted global colors, as that incremental numbering naming convention looks similar to that.
This merely looks like someoen used a Thai font, but with Western encoding and the characters display differently on a western system. Nothing serious. Simply renaming the swatches will work just fine as would replacing the swatches from a local color book...