How to delete unwanted language pack on xbox one?

Hello, first it's a pleasure to be able to help you today.

My name is welcome to the community.

Hello Houssam, the language of the system has to do with the region of the store or system you have chosen, on Xbox you have 3 options.

Going in Settings»System»Language and Location; you have the spoken language for the voice commands, the language region, and the store region, put it in the language you want, and it will no longer display French.

Note: The packs are native so there's no possibility to erase them from Xbox One.

Thank you, Mr. Georges C, for your help I wish if there is any possible way to solve that like giving my Xbox id number to Xbox to remove it remotely ( just an example ) if possible and thank you again.

First your account language has to be one of the supported languages as language packs do.have to be made

Languages are based on xbox live regions if you dont live ina xbox live region or you live in one but its not the main language its unlikely to be added

Hello BradShadwick, my name is Vanessa, and I would be happy to help.

Surely frustrating, in theory the solution to the problem you are experiencing is quite simple. When installing a language pack in Windows, it changes the display language
of certain applications, but not the system in general. This means that even if you have the display language of your system configured to English, applications that use
the installed language pack will display their content in the language of the pack.

In your case, the Japanese language pack is changing the display language of Windows and Xbox apps. To fix this problem, you need to uninstall the Japanese language pack.
Once you have done this, all apps will return to displaying their content in the display language of your system, which in your case is English.

If you want to continue using the Japanese keyboard, you can install it separately. To do this, open the Settings app, go to "Time & Language" and then click "Languages". In the "Installed languages" section, click the "Manage languages" button. In the "Manage languages" window, click the Japanese language pack and then click the "Options" button. In the "Language options" window, uncheck the "Install keyboard" checkbox and then click the "OK" button.

Once you have done this, the Japanese keyboard will be installed without changing the display language of your system.

Here are the detailed steps on how to uninstall the Japanese language pack:

Steps on how to uninstall the Japanese language pack in Windows

Open the Settings app.
Go to "Time & Language".
Click "Languages".
In the "Installed languages" section, click the Japanese language pack.
Click the "Uninstall" button.
In the confirmation window, click "Uninstall".
If you are still having problems after uninstalling the Japanese language pack, you can try updating Windows to the latest version. Windows updates can sometimes fix language-
related issues.

If you are unable to resolve your issue, please let me know so that I can research the issue. As far as I know, this is something that should be fixed by Windows itself, but if not, I will need to investigate. Good luck!

Certainly, I investigated to strengthen what I tell you, and part of the information
you can verify it from here https://answers.microsoft.com/en-us...ge-pack/aee0abd1-b864-4784-850b-7618b5fc7415:

If you have any further questions or need additional assistance, please do not hesitate to contact us. We are here to help.

Best regards,
Vanessa.

Hello Adni how are you?

My name is Ezequiel I'm an Independent Consultant.

I believe you can only have Japanese languages ​​and subtitles if you have the game in Asian version, the western game does not come with Japanese language, I suggest you perform or buy the Japanese version.

Maybe there is a possibility you can download a language pack if it's on the Xbox store in Japan, but I'm not sure if such a language pack exists.