Sometimes, simply going to Properties > Language in Steam and selecting English will trigger a download for these files, although this does not work for all regional versions (e.g., restricted Russian versions). Alternative for Russian Versions: If you are trying to convert from Russian, specific localization.txt edits are often required to prevent it from reverting. Steam Community
: If you purchased a version specifically for a region like Russia or Poland, the English option may not appear in the Steam properties menu. In these cases, users often have to manually move localized_english_iw.iwd files into the main folder and updated .ff files into the zone/english folder. modern warfare 3 2011 english language pack