Error: "The language is not supported on the server"

Hi,

I started to receive this error message when I try to create a new web: "The language is not supported on the server"

This is code I'm using:

SPWeb newWeb = web.Webs.Add(siteUrl, siteTitle, siteDescription, web.RegionalSettings.LocaleId, siteTemplate, UseUniquePermissions, false

...where 'web' is my current website and 'siteTemplate' is my web template.

I have checked the language settings on the SharePoint server (I have only one server) and it's US. The registry key is also set to 1033 (which corresponds to US) as suggested here: http://sharepoint.stackexchange.com/questions/139515/the-language-is-not-supported-on-the-server

Any idea what else can I do to fix this error?

Thanks,

Leszek

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