I know this question has long asked a question, but since there was no answer here, I suggest:
#, ResourceManager.
.
. switch if ( ) . , GetString(), , , , - lblName.
N.B: , .
string selectedLanguage = comboBoxLang.Text;
string resourceFile = string.Empty;
Logic to retrieve the proper resourceFile depending on the selectedLanguage.
ResourceManager rm = new ResourceManager(resourceFile, Assembly.GetExecutingAssembly());
lblName.Text = rm.GetString("lblName");