The search term "MCL Valluvan" points to a specific typeface designed for the Tamil script. The name "Valluvan" is a direct homage to , the legendary Tamil poet and philosopher whose work, the Tirukkuṟaḷ , is a cornerstone of Tamil literature. Naming a font after him signifies a connection to classicism, readability, and cultural depth.
If you cannot find a verified, safe source for the legacy MCL Valluvan font, your best option is to use modern, open-source Unicode Tamil fonts. These are completely free, safe from malware, and guaranteed to work across all modern operating systems and design software. Top Safe Sources for Free Tamil Fonts