Summary

There is clearly a need to communicate with participant nations in any space venture or colonization effort. Astronauts on the ISS learn multiple languages, scientists and engineers can converse using globally accepted terminology and mathematics and individuals can train their ear to pick up the sounds of a foreign language or accent to better understand the communications.

Participants in a colonial migration will undoubtedly apply their own coping mechanism to communicate within the confines of a long space journey and eventual habitation, and this will eventually lead to the development of a new language probably comprised of parts from numerous root languages.

Regardless of the reason, the language structure will take on a concise, simplistic format, conducive to easy digitization and storage. Computer based storage and readability will be paramount as hand written mechanisms and materials will be in limited supply and expensive to transport or manufacture. 

A new colonial language will not likely be logographic due to the complexities of the script. Anew script will be easily readable and pronounceable by all participants leading to common characters. The progenitor languages will fade or evolve as time progresses and the need to continue communications between Earth and the colonies will mean that the colonial language will become part of Earths language bank. 

What will a new language look and sound like, it is impossible to say. It is, however, safe to say that there will be a new language and it will follow the structures we currently apply to language development.