i downloaded the program and it said Failed - Virus scan failed.

Please ensure you are downloading from the official download site here: https://www.curseforge.com/minecraft/mc-mods/fabric-language-kotlin/files

The scan is failing to run pointing to an issue on your end, and not suggesting that the file you downloaded is a virus.

You can see the virus totally report of the latest version here: https://www.virustotal.com/gui/file/5c797764e952317b0e38f0c0b565cd18e2067bc73fbeb71afd6b22ffa5c2c8f5/detection

If you are still unsure you can always built it from the source code hosted on this github repo.

i downloaded the program again and it doesnt have any issues now, thanks.