Some things we could use for inspiration:

Spanish Phrase Book for First-Aid Trained Activists
http://bostoncoop.net/balm/phrasebook1.pdf

Emergency multilingual phrasebook
http://www.dh.gov.uk/PublicationsAndStatistics/Publications/PublicationsPolicyAndGuidance/PublicationsPolicyAndGuidanceArticle/fs/en?CONTENT_ID=4073230&chk=8XboAN

Ogden's Basic English:

http://ogden.basic-english.org/words.html