Next, "large character set" becomes broad. Then, "OpenType features" might be tricky because it's a technical term. The user says not to change proper nouns, so OpenType itself should stay. So the synonyms here could be features.
readable font is designed to be highly legible, even at small sizes, making it suitable for body text. broad character set: The font includes a large character set, supporting over 200 languages. capabilities: The font includes OpenType features, such as ligatures and stylistic alternates. Neue Frutiger World Font Download
Also, technical terms like "installation instructions" should have their words replaced. "Installation" could be "setup|installation|set up". Next, "large character set" becomes broad