Changing the language in Terrorist Takedown 3 to English is not straightforward, but it is entirely possible. For 90% of users, editing the config.ini file is the magic bullet. For the rest, registry edits or launch options will do the trick. Only the most stubborn region-locked versions require manual file replacement.
Changing the language in Terrorist Takedown 3 to English often requires manually replacing the Terrorist Takedown 3 Change Language To English