villancico sm [biʝan'siko] AmLat.; [biʎan̟'θiko] Esp.
"Carl" in Spanish would be "Carlos" if it's a person's name. If you are referring to another context, please provide more information for a specific translation.
You can say "Te amo, Carl" or "Te quiero, Carl".
"Charles" is an English equivalent of the Spanish name Carlos. The masculine proper name originates in the Germanic word *karlaz ("free man") and therefore also translates into English as "Carl." The pronunciation will be "KAR-los" in Spanish.
Carl Crack's birth name is Carl Bhm.
Carl Strecker's birth name is Carl Strecker.
Carl Andress's birth name is Carl Andruskevich.
Carl Axzelle's birth name is Carl Bergstrom.
Carl Merz's birth name is Carl Czell.
Carl Goetz's birth name is Carl Perl.
Carl Hoff's birth name is Hoffmayr, Carl.
Carl Crawford's birth name is Carl Demonte Crawford.
Carl Sawatski's birth name is Carl Ernest Sawatski.