Many fonts on Typekit support Catalan. You can browse fonts that support Catalan by selecting "Catalan" from the list of supported languages in the sidebar under browse fonts.
In order to serve fonts in Catalan, you must enable the "all characters" set in your kit. All fonts that support Catalan include (at minimum) the following letter characters:
| A | B | C | D | E | F | G | H |
| I | J | K | L | M | N | O | P |
| Q | R | S | T | U | V | W | X |
| Y | Z | a | b | c | d | e | f |
| g | h | i | j | k | l | m | n |
| o | p | q | r | s | t | u | v |
| w | x | y | z | · | À | Ç | È |
| É | Í | Ï | Ò | Ó | Ú | Ü | à |
| ç | è | é | í | ï | ò | ó | ú |
| ü | Ŀ | ŀ |