The following link leads to a scientific experiment to determine whether communication has to do with linguistic skills:
http://pss.sagepub.com/content/21/1/8.full.pdf+html?rss=1
The gist is in the last sentence:
« We conclude that the generation of communicative utterances relies on a neurocognitive system that is involved in understanding intentions of others, and that is distinct from the language system. »
Something worthwhile to remember when translating. Translation is communication, spreading the word.