[marci]

In french as well (pas à pas).

[harperlee]

The accent in the video is strongly spanish, so it most probably pas a pas is catalan :P

[grzm]

The creator is Ishac Bertran who hails from Barcelona. He currently lives in Seattle, and developed the project while at the Copenhagen Institute of Interaction Design. Seems like a pretty international individual.

http://ishback.com/about.html

[ivansavz]

Also the missing accent grave on the letter "a" supports the Catalan hypothesis.