(une) langue secrète
You can say "langage secret" in French.
Yes, "en quelle langue" is the correct way to say "In what language" in French.
In French, "with" is typically translated as "avec."
In French, "morning" is said as "matin".
The word for "magical" in French is "magique."
"King" in French is "roi."
Secret
un secret
Son âge est secret.
ton/votre petit secret
Français
Secret love could be translated as "amour caché" or "amour secret".
secret, secrète
Comment dit-on ...?
c'est
Yes, "en quelle langue" is the correct way to say "In what language" in French.
To say the word beard in the French language you say barbe. This word is said as barba in the Italian language and in Latin it is mentum.
comment dire language