VSTSC : error TS6049: Build: Unsupported locale 'sv-SE'.

[Bartolomeus-649]

TypeScript Version: 1.8.29.0
Microsoft Visual Studio Professional 2015 - Version: 14.0.25123.00 Update 2
Microsoft .NET Framework Version: 4.6.01055
Se bottom of message for complete version info from Visual Studio => Help => About

All of a sudden I am getting this error when I build:
VSTSC : error TS6049: Build: Unsupported locale 'sv-SE'.

The command that precides the error message above is:
C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\tsc.exe --sourcemap --target ES5 --noEmitOnError --locale sv-SE "file1.ts" "file2.ts" "file3.ts" ... <Many more ts-files> ... "fileX.ts"

Here is the part of the log where typescrip is mentioned
8>Target "PreComputeCompileTypeScript" in file "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\TypeScript\Microsoft.TypeScript.targets" from project "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\MyApplicationWebMobileApplication.csproj" (target "CompileTypeScript" depends on it): 8>Using "VsTsc" task from assembly "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\TypeScript\TypeScript.tasks.dll". 8>Task "VsTsc" 8> C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\tsc.exe --sourcemap --target ES5 --noEmitOnError --locale sv-SE "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\MyApplication.Mobile.Common.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\MyApplication.Mobile.LocalBlup.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\typings\jquerymobile\jquerymobile.d.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\typings\jquery\jquery.d.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\typings\modernizr\modernizr.d.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Blup\Details.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Blup\Lamning.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Blup\SearchBlup.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Shared\AnteckningPlugin.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Home\Index.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Shared\CommonPopups.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Shared\BlupPopups.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Vagning\Vagning.ts" 8>Done executing task "VsTsc". 8>Done building target "PreComputeCompileTypeScript" in project "MyApplicationWebMobileApplication.csproj". 8>Target "PreComputeCompileTypeScriptWithTSConfig" skipped, due to false condition; ('@(ConfigFiles)' != '') was evaluated as ('' != ''). 8>Target "CompileTypeScript" in file "C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\TypeScript\Microsoft.TypeScript.targets" from project "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\MyApplicationWebMobileApplication.csproj" (target "Compile" depends on it): 8>Building target "CompileTypeScript" completely. 8>Output file "Scripts\MyApplication.Mobile.Common.js" does not exist. 8>Task "VsTsc" 8> C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\tsc.exe --sourcemap --target ES5 --noEmitOnError --locale sv-SE "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\MyApplication.Mobile.Common.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\MyApplication.Mobile.LocalBlup.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\typings\jquerymobile\jquerymobile.d.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\typings\jquery\jquery.d.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\typings\modernizr\modernizr.d.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Blup\Details.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Blup\Lamning.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Blup\SearchBlup.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Shared\AnteckningPlugin.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Home\Index.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Shared\CommonPopups.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Shared\BlupPopups.ts" "C:\Code\Pri\MyApplication\Development\AzureWebApp\Source\MyApplicationWebMobileApplication\Scripts\Views\Vagning\Vagning.ts" 8>VSTSC : error TS6049: Build: Unsupported locale 'sv-SE'. 8> 8> The command exited with code 1. 8>Done executing task "VsTsc" -- FAILED. 8>Done building target "CompileTypeScript" in project "MyApplicationWebMobileApplication.csproj" -- FAILED.

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Microsoft Visual Studio Professional 2015
Version 14.0.25123.00 Update 2
Microsoft .NET Framework
Version 4.6.01055

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Application Insights Tools for Visual Studio Package 5.2.60328.3
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ASP.NET and Web Tools 2015 (RC1 Update 1) 14.1.20203.0
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ASP.NET Web Frameworks and Tools 2012.2 4.1.41102.0
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ASP.NET Web Frameworks and Tools 2013 5.2.40314.0
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Azure App Service Tools v2.9 14.0.20316.0
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Azure Data Lake Node 1.0
This package contains the Data Lake integration nodes for Server Explorer.

Azure Data Lake Tools for Visual Studio 2.0.6000.0
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Clang with Microsoft CodeGen 14.0.25115
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Common Azure Tools 1.7
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

DataFactoryProject 1.0
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Microsoft Azure Tools 2.8
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Microsoft Visual Studio Process Editor 1.0
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Office Developer Tools for Visual Studio 2015 ENU 14.0.23025
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Python Tools for Visual Studio 2.2.40315.00
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SQL Server Data Tools 14.0.60311.1
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TypeScript 1.8.29.0
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Visual C++ for Cross Platform Mobile Development (Android) 14.0.25116.00
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Visual C++ for Cross Platform Mobile Development (iOS) 14.0.25116.00
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https://GitHub.com/EWSoftware/VSSpellChecker

Visual Studio Tools for Apache Cordova Update 8
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Visual Studio Tools for Universal Windows Apps 14.0.25123.00
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Xamarin 3.11.1537.0 (a11147b)
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Xamarin.Android 5.1.7.12 (53fce3730830417896a42f365a5ba35f1ee58d9d)
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Xamarin.iOS Unified Migration 1.0
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Xamarin.TestCloud.Integration 1.0
Early preview of Xamarin Test Cloud integration

[eloekset]

I get this error after upgrading VS2015 to 14.0.25123.00 and Tools For Apache Cordova to Update 8.1:
Code: TS6049
Description: Build: Unsupported locale 'nb-NO'

[mhegazy]

I have a fix for this checked in, you can use the nighly nuget package to build (see https://github.com/Microsoft/TypeScript-Handbook/blob/master/pages/Nightly%20Builds.md#using-nuget-with-msbuild for more details), or manually, copy
C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\en to C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\sv-SE (or C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\nb-NO)

[Bartolomeus-649]

Just stop localizing error messages. Everyone who is coding know english well enough to read the error messages, and they want to google the messages they get, and with localized messages that is a HUGE issue since you won't get any hits.
Try searching for "En 'få' tillträdare kan inte ha parametrar" ("A 'get' accessor cannot have parameters.") or "bakre kommatecken är inte tillåtna" ("Trailing comma not allowed.").
Also since the translation is done by "professional" translators with little or no knowledge or understanding of computers, programming or adequate terminology, the translation is usually so bad it is impossible to sometime understand what the error is about at all.

So just stop doing it altogether and focus your energy on more important stuff.

[Olli-palkkaus]

Absolutely agree with 649. Localizing error messages by default is a really really bad idea.

Nobody who is even remotely professional in programming will ever want localized error messages. Also brings a lot of problems in international teams with no benefit. If you must do this work, make it optional.

Thanks for the fix though - copying the folder worked.

[caspChristian]

So NCrunch gives me the "very helpful" output of a failed build:
..\..\..\..\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v14.0\TypeScript\Microsoft.TypeScript.targets (242, 5): tsc.exe avbröts med koden 1.
(This is left here so that anyone searching about this has a chance of finding it without digging as deep in the rabbit hole that I had to do.)

After digging a lot into how to enable verbose logging for the build process I was finally able to find this:
C:\Program Files (x86)\Microsoft SDKs\TypeScript\1.8\tsc.exe --noEmitOnError --locale sv-SE .... C:\Users\Dev\AppData\Local\NCrunch\13372\4\...\error TS6049:Build:Unsupported locale 'sv-SE'. tsc.exe avbröts med koden 1.

So upgrading TS should fix that? What if that isn't an option?
@mhegazy How can tsc even be allowed to fail due to a missing locale in the first place? And why should it localize at all?
It's quite bad handled by not responding to these concerns.