otfinfo -i arial.ttf

This designates the . It means this specific file contains the glyphs (letter shapes) required for Western European languages. This includes standard English A-Z but also adds accented characters needed for languages like French (é), German (ü), and Spanish (ñ).

When you dig into the font files on a Windows computer, you often encounter technical strings like "Arial Normal OpenType TrueType Version 7.01 Western." While it looks like technical jargon, each part of that phrase describes exactly how one of the world’s most ubiquitous typefaces functions on your computer.