Look for a reputable source containing the GDFBinary_en_US.dll and the English localization folders (usually found in Data/Win32/Loc ).
Medal of Honor: Warfighter was published by EA during a time when regional locking was still aggressive. In many regions (especially Russia, Poland, and parts of Asia), the game was sold with to prevent people from buying cheaper keys and switching to English. Look for a reputable source containing the GDFBinary_en_US
Leave a comment below with your game version (Steam, EA App, DVD) and your current non-English language. We troubleshoot every week. and parts of Asia)