Thief is a stealth-focused RPG/stealth-action franchise; this post explains the English language pack: what it is, why you might need it, how to install it, common issues, and quick troubleshooting.
There are known malware strains that disguise themselves as "language packs" for software or games. The name suggests a Trojan that steals data (a "thief"). Thief english language pack
Why go through all this trouble? Because changing the language fundamentally changes the game. Thief — English Language Pack (useful post) Thief
While the Thief English Language Pack is a popular choice among gamers, there are alternative solutions available. Here are a few: The Importance of Voice Acting in Thief Why
Global Versions: Because different regional releases (German, French, Spanish) had full localizations, players often need English language packs to hear the original performances while keeping their preferred UI language. How to Restore the English Language Pack 1. Using Essential Fan Patches