Here is the line of code which help to find assembly for required culture:
Assembly.GetExecutingAssembly().GetSatelliteAssembly(new CultureInfo(cultureCode))
But how to find languages for which satellite assemblies exist for application, lets say if there are 3 language support for which 3 different folder created, now I want those folders and languages supported in it. I use this in drop down from where user can select language and drop down values should be dynamically loaded as per supported satellite assemblies.