I have a Sitecore JSS site with SXA. In my Site Grouping item, I've chosen the language as en-ca. Now, I've written a pipeline to change my context language under certain conditions. It's working fine in my local environment, which doesn't have the SXA Site Grouping item. However, when I move the code to a higher environment where SXA is enabled and en-ca is set as the default language in the CD site grouping item, it always loads the site in en-ca.

If I send null in the default language field, the site throws a 502 error as the Sitecore context language becomes null.

<httpRequestBegin>
<processor type="Sitecore.Cloud.Integration.Bootload.PostStepsRunner.AbortRequestOnPackageMaintenance, Sitecore.Cloud.Integration.Bootload.PostStepsRunner" resolve="true" patch:source="Sitecore.Cloud.Integration.Bootload.PostStepsRunner.config"/>
<processor type="Sitecore.Pipelines.PreprocessRequest.CheckIgnoreFlag, Sitecore.Kernel"/>
<processor type="Sitecore.Pipelines.HttpRequest.EnsureServerUrl, Sitecore.Kernel"/>
<processor type="Sitecore.Pipelines.HttpRequest.StartMeasurements, Sitecore.Kernel"/>
<processor type="Sitecore.Pipelines.HttpRequest.IgnoreList, Sitecore.Kernel" patch:source="Sitecore.XA.Feature.Horizon.config">
<prefixes hint="list">
<prefix name="identityProcessing" patch:source="Sitecore.Owin.Authentication.config">/identity/</prefix>
<prefix name="service" patch:source="Sitecore.GraphQL.config">/sitecore/api/authoring/</prefix>
<prefix name="sxa" patch:source="Sitecore.XA.Feature.Horizon.config">/sxa/horizon/</prefix>
</prefixes>
</processor>
<processor type="Sitecore.Mvc.Pipelines.HttpRequest.DisplayFatalErrors, Sitecore.Mvc" patch:source="Sitecore.Mvc.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.SiteResolver, Sitecore.Kernel" resolve="true"/>
<processor type="Sitecore.ExperienceEditor.Pipelines.HttpRequest.ResolveSite, Sitecore.ExperienceEditor" patch:source="Sitecore.ExperienceEditor.config"/>
<processor type="Sitecore.ItemWebApi.Pipelines.HttpRequest.SetRuntimeSettings, Sitecore.ItemWebApi" patch:source="Sitecore.ItemWebApi.config"/>
<processor type="Sitecore.ItemWebApi.Pipelines.HttpRequest.CheckMode, Sitecore.ItemWebApi" patch:source="Sitecore.ItemWebApi.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.UserResolver, Sitecore.Kernel"/>
<processor type="Sitecore.ItemWebApi.Pipelines.HttpRequest.ResolveUserFromRequest, Sitecore.ItemWebApi" patch:source="Sitecore.ItemWebApi.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.DatabaseResolver, Sitecore.Kernel"/>
<processor type="Sitecore.XA.Foundation.SiteMetadata.Pipelines.HttpRequestBegin.SxaSitemapHandler, Sitecore.XA.Foundation.SiteMetadata" resolve="true" patch:source="Sitecore.XA.Foundation.SiteMetadata.config"/>
<processor type="Sitecore.XA.Foundation.SiteMetadata.Pipelines.HttpRequestBegin.RobotsHandler, Sitecore.XA.Foundation.SiteMetadata" resolve="true" patch:source="Sitecore.XA.Foundation.SiteMetadata.config">
<CacheExpiration>720</CacheExpiration>
</processor>
<processor type="Sitecore.Pipelines.HttpRequest.BeginDiagnostics, Sitecore.Kernel"/>
<processor type="Sitecore.XA.Feature.CreativeExchange.Pipelines.HttpRequestBegin.EnableCreativeExchangeMode, Sitecore.XA.Feature.CreativeExchange" resolve="true" patch:source="Sitecore.XA.Feature.CreativeExchange.config"/>
<processor type="Sitecore.XA.Feature.Json.Pipelines.HttpRequest.ResolveJsonDevice, Sitecore.XA.Feature.Json" resolve="true" patch:source="Sitecore.XA.Feature.Json.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.DeviceResolver, Sitecore.Kernel"/>
<processor type="Sitecore.XA.Feature.DeviceResolver.Pipelines.HttpRequestBegin.MultiAgentDeviceResolver, Sitecore.XA.Feature.DeviceResolver" resolve="true" patch:source="Sitecore.XA.Feature.DeviceResolver.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.LanguageResolver, Sitecore.Kernel" resolve="true"/>
<processor type="Sitecore.ItemWebApi.Pipelines.HttpRequest.ResolveLanguage, Sitecore.ItemWebApi" patch:source="Sitecore.ItemWebApi.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.CustomHandlers, Sitecore.Kernel">
<param type="Sitecore.Pipelines.HttpRequest.HandlerMapping.DirectHandlerMapper, Sitecore.Kernel" resolve="true"/>
</processor>
<processor type="Sitecore.ItemWebApi.Pipelines.HttpRequest.HandleActionRequest, Sitecore.ItemWebApi" patch:source="Sitecore.ItemWebApi.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.QueryStringResolver, Sitecore.Kernel"/>
<processor type="Sitecore.Pipelines.HttpRequest.DynamicLinkResolver, Sitecore.Kernel"/>
<processor type="Sitecore.Pipelines.HttpRequest.AliasResolver, Sitecore.Kernel"/>
<processor type="Sitecore.Pipelines.HttpRequest.DefaultResolver, Sitecore.Kernel"/>
<processor type="Sitecore.Pipelines.HttpRequest.FileResolver, Sitecore.Kernel"/>
<processor type="Sitecore.Mvc.DeviceSimulator.Pipelines.HttpRequest.HandleSimulationRequest, Sitecore.Mvc.DeviceSimulator" patch:source="Sitecore.MVC.DeviceSimulator.config"/>
<processor type="Sitecore.Mvc.Pipelines.HttpRequest.TransferRoutedRequest, Sitecore.Mvc" patch:source="Sitecore.Mvc.config"/>
<processor type="Sitecore.LayoutService.Mvc.Pipelines.HttpRequestBegin.SkipContextItemResolutionWhenLayoutServiceRequest, Sitecore.LayoutService.Mvc" resolve="true" patch:source="Sitecore.LayoutService.Mvc.config"/>
<processor type="Sitecore.Services.GraphQL.Hosting.Mvc.Pipelines.HttpRequestBegin.SkipContextItemResolutionWhenGraphQLRequest, Sitecore.Services.GraphQL.NetFxHost" resolve="true" patch:source="Sitecore.Services.GraphQL.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.ItemResolver, Sitecore.Kernel" resolve="true"/>
<processor type="Sitecore.XA.Foundation.SitecoreExtensions.Pipelines.HttpRequestBegin.CultureResolver, Sitecore.XA.Foundation.SitecoreExtensions" resolve="true" patch:source="Sitecore.XA.Foundation.SitecoreExtensions.config"/>
<processor type="Sitecore.XA.Foundation.Redirects.Pipelines.HttpRequestBegin.RedirectItem, Sitecore.XA.Foundation.Redirects" resolve="true" patch:source="Sitecore.XA.Foundation.Redirects.config"/>
<processor type="Sitecore.XA.Foundation.Redirects.Pipelines.HttpRequest.RedirectMapResolver, Sitecore.XA.Foundation.Redirects" resolve="true" patch:source="Sitecore.XA.Foundation.Redirects.config">
<CacheExpiration>720</CacheExpiration>
</processor>
<processor type="Sitecore.XA.Foundation.Multisite.Pipelines.HttpRequest.LocalizableUrlItemResolver, Sitecore.XA.Foundation.Multisite" resolve="true" patch:source="Sitecore.XA.Foundation.Multisite.config">
<CacheExpiration>5</CacheExpiration>
</processor>
<processor type="Sitecore.XA.Feature.ErrorHandling.Pipelines.HttpRequestBegin.ItemNotFoundResolver, Sitecore.XA.Feature.ErrorHandling" resolve="true" patch:source="Sitecore.XA.Feature.ErrorHandling.config"/>
<processor type="Sitecore.JavaScriptServices.ViewEngine.Pipelines.HttpRequest.HeadlessSiteAccess, Sitecore.JavaScriptServices.ViewEngine" resolve="true" patch:source="Sitecore.JavaScriptServices.ViewEngine.config"/>
<processor type="Sitecore.XA.Foundation.Multisite.Pipelines.HttpRequest.ResolveContentLanguage, Sitecore.XA.Foundation.Multisite" resolve="true" patch:source="Sitecore.XA.Foundation.Multisite.config"/>
<processor type="Sitecore.ItemWebApi.Pipelines.HttpRequest.LaunchRequest, Sitecore.ItemWebApi" patch:source="Sitecore.ItemWebApi.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.DeviceSimulatorResolver, Sitecore.Kernel"/>
<processor type="Sitecore.XA.Feature.Overlays.Pipelines.HttpRequestBegin.OverlayTypeResolver, Sitecore.XA.Feature.Overlays" resolve="true" patch:source="Sitecore.XA.Feature.Overlays.config"/>
<processor type="Sitecore.XA.Foundation.Theming.Pipelines.HttpRequestBegin.AppendCompatibilityModeHeader, Sitecore.XA.Foundation.Theming" resolve="true" patch:source="Sitecore.XA.Foundation.Theming.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.LayoutResolver, Sitecore.Kernel"/>
<processor type="Sitecore.XA.Feature.ErrorHandling.Pipelines.HttpRequestBegin.LayoutNotFoundResolver, Sitecore.XA.Feature.ErrorHandling" resolve="true" patch:source="Sitecore.XA.Feature.ErrorHandling.config"/>
<processor type="Sitecore.XA.JSS.Foundation.Integration.Pipelines.HttpRequestBegin.AppPathNotFoundResolver, Sitecore.XA.JSS.Foundation.Integration" resolve="true" patch:source="Sitecore.XA.JSS.Foundation.Integration.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.PageEditorHandleNoLayout, Sitecore.ExperienceEditor" resolve="true" patch:source="Sitecore.XA.Feature.DeviceResolver.config"/>
<processor type="Sitecore.ExperienceEditor.Pipelines.HttpRequest.CheckDevice, Sitecore.ExperienceEditor" resolve="true" patch:source="Sitecore.XA.Feature.DeviceResolver.config"/>
<processor type="Sitecore.Mvc.Pipelines.HttpRequest.TransferMvcLayout, Sitecore.Mvc" patch:source="Sitecore.Mvc.config"/>
<processor type="Sitecore.Mvc.Pipelines.HttpRequest.TransferControllerRequest, Sitecore.Mvc" patch:source="Sitecore.Mvc.config"/>
<processor type="Sitecore.Pipelines.HttpRequest.ExecuteRequest, Sitecore.Kernel" resolve="true"/>
</httpRequestBegin>

I'm unsure where to place my pipeline in the httpRequestBegin pipeline to override the SXA default language set in the site grouping item.

We have a Sitecore 10.3 SXA JSS site with a React frontend utilizing a headless proxy. The default language, as specified in the JSS app's Site Grouping item's language field, is en-CA. However, a new business requirement dictates that the site context language should dynamically switch to fr-CA based on the user's location (X location). While we can successfully fetch the user's language, we're unable to programmatically change the context language within the SXA site because the Site Grouping item always defaults to en-CA. Our challenge is to override the default language setting and change the context language based on user location using code within the SXA site.

Can we change context language of SXA site programmatically without touching the language mentioned on site grouping item ?