If you have tried all four methods and your DiagBox remains stuck in French or Chinese, the most reliable solution is a clean reinstallation using an official multi-language ISO image from a trusted PSA diagnostics source. Always ensure you have a valid activation code and a genuine ACTIA interface to avoid language locks in the future.
Download the official language pack for your DiagBox version (search for "DiagBox EN language pack" on technical forums like PSA diagnostics or the DiagBox subreddit).
To solve this, many installations come with a batch script file included specifically for the keyword "Diagbox change language to English."
Before diving into the system files, check if your version allows a manual switch through the interface. Launch . diagbox change language
A critical technical nuance often ignored by forum posts: The full-chip version of DiagBox—the one requiring the ACTIA VCI interface with a physical license chip—sometimes locks the software language to the chip's region. A VCI purchased from a French dealer ( RENAULT/PSA FR ) transmits a hardware token that forces the software into French, regardless of the OS settings. Changing the language on these units requires re-flashing the VCI’s EEPROM (a 24Cxx series chip) using a programmer like the Xgecu T48—a process that voids the tool's calibration certification.
However, one of the most common frustrations for independent mechanics and DIY car enthusiasts is dealing with a DiagBox interface that defaults to an unfamiliar language (often French or Chinese). Whether you accidentally installed the wrong language pack or purchased a pre-configured diagnostic interface online, knowing how to is essential.
If the language still does not appear, you may need to edit the LanguageList.ini file in the same directory to add: English=EN If you have tried all four methods and
: Run DiagBox as an Administrator for changes to take effect.
Find the line that says: Language=FR (for French) or Language=ZH (for Chinese).
Ensure your Windows "Language for non-Unicode programs" is set to the same language as your DiagBox setting to avoid display errors or "garbage" text. To solve this, many installations come with a
On the main menu (where you select the vehicle brand), look for the icon (usually represented by a gear or a toolbox). Navigate to Language Selection .
In C:\AWRoot\Lang\ , folders exist for each language (e.g., Lang_ENG , Lang_ESP ). The software will only switch if the target folder contains the requisite .res (resource) and .bmp (bitmap) files. If the folder is empty or missing, the software defaults to French. A common failure occurs when a user installs a "light" version of DiagBox stripped of all but one language.