That is a sign of ISO-8859 encoding and probably due to the fact that the developers of the site are from Budapest, Hungary.
|Oh, what is this?|
- Do not use the "Import Dataset" assistant. The encoding option has no effect in some versions.
- Use the command line and enter WGAcatalog <- read.csv2("WGAcatalog.csv", sep=";", encoding="iso_8859-1")