1. Go to Apertium website ( http://www.apertium.org/ )
2. Select a language pair you could use for a translation (e.g., English to Spanish).
3. Translate some paragraphs taken from Wikipedia. You can look for articles available in many languages ( such as http://en.wikipedia.org/wiki/Charlie_Chaplin ), select text from some paragraphs and paste it into Apertium.
4. Fill this form for each language pair you know.
Note that by submitting this form you agree to the terms and conditions and license language in the release ( http://goo.gl/a2M2Q ).