Cannot switch the FSI language to english

[blfuentes]

I have installed net core 7.0.402 in an OS with language settings in Spanish but without any language pack installed, so the dotnet sdk should be in english.
I have added the environment variable to force dotnet to run with english locale:

So far, this seems to work for running dotnet commands (I am leaving an error to show that the msbuild reports the errors and are displayed in english:

But whenever I execute dotnet fsi, the fsi interactive terminal switches to my OS language(Spanish)

Can I somehow change the FSI interactive language to use also english?

I found a workaround #https://github.com/dotnet/msbuild/issues/1596#issuecomment-738722213
Basically, delete the {locale} folder within the sdk/{version}/fsharp/{locale}
OS System: Windows 10 22h2 build 19045.3570
netcore Version 7.0.402

Thanks!

[vzarytovskii]

I don't think we have a way, other than setting language for current console, @KevinRansom?

[baronfel]

I think the correct way to do this would be in the 'dotnet fsi' wrapper command in the dotnet/sdk repo, since this is a question of making an SDK convention apply to a tool that ships as part of the SDK. If there's a known flag/argument for controlling locale then we can set it in that wrapper before invoking the FSI assembly. This is how many integrations (Nuget, format, etc) already happen in the SDK.

[KevinRansom]

fsi has a command line option --preferreduilang to set the current language
dotnet-fsi --preferreduilang:es-ES
in your case:
dotnet-fsi --preferreduilang:en-EN

There is no persistent way of specifying this other than using the Operating System settings.

I have tested a fix that I will submit to the dotnet sdk:

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>dotnet fsi

Microsoft (R) F# interactivo, versión 12.8.400.0 for F# 8.0
Copyright (C) Microsoft Corporation. Todos los derechos reservados.

Para obtener ayuda, escriba #help;;

> #quit;;

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>set DOTNET_CLI_UI_LANGUAGE=en-En

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>dotnet fsi

Microsoft (R) F# Interactive version 12.8.400.0 for F# 8.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> #quit;;

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>set DOTNET_CLI_UI_LANGUAGE=

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>dotnet fsi

Microsoft (R) F# Interactive version 12.8.400.0 for F# 8.0
Copyright (c) Microsoft Corporation. All Rights Reserved.

For help type #help;;

> #quit;;

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>set DOTNET_CLI_UI_LANGUAGE=es-Es

C:\kevinransom\sdk\artifacts\bin\redist\Debug\dotnet>dotnet fsi

Microsoft (R) F# interactivo, versión 12.8.400.0 for F# 8.0
Copyright (C) Microsoft Corporation. Todos los derechos reservados.

Para obtener ayuda, escriba #help;;

>

[blfuentes]

thanks!

[toburger]

I am using the latest .net 8 runtime and calling dotnet fsi doesn't consider the DOTNET_CLI_UI_LANGUAGE environment variable.

Calling dotnet for the first time produces a mix of languages where a part comes from the dotnet runtime and fsi interactive:

---

OT: Funnily enough updating the workload as mentioned in the screenshot doesn't respect my language settings, again! Not that you can do anything about it from the F# side but oh my is this a mess! Why does Microsoft always want to localize all my developer tools!?

I'm not even a native Italian speaker! 😆