[custom-es-directory]
exten => s,1,Answer
exten => s,n,Set(CHANNEL(language)=es)
exten => s,n,Goto(app-directory,#,1)

[custom-en-directory]
exten => s,1,Answer
exten => s,n,Set(CHANNEL(language)=en)
exten => s,n,Goto(app-directory,#,1)

[custom-fr-directory]
exten => s,1,Answer
exten => s,n,Set(CHANNEL(language)=fr)
exten => s,n,Goto(app-directory,#,1)