ColumnFilter does not support numerical filtering with culture as es-CO

Not really. You can set Application.CurrentCulture when the page loads. And keep setting Application.CurrentCulture to switch it back and forth. But in general there is always one culture active.

More information: In .NET the culture is used to parse to format strings to/from numbers or dates, and to load localized resx files. All parsing and formatting methods have an additional argument for the culture to use. When not set, it defaults to the CurrentCulture set on the current thread. This is not wisej stuff, it’s standard .NET. Wisej sets the default culture of each thread at the start of the request. An app can change the current thread’s default culture when in starts. See ThreadBegin or BeginRequest or similar. OR it can use custom parsing or formatting code specifying the culture. See https://learn.microsoft.com/en-us/dotnet/api/system.threading.thread.currentculture?view=net-9.0