The hazard
A lot of the safety on a job depends on messages getting through: the morning plan, a shouted warning, a hand signal to an operator, a tag on a switch, a label on a drum. On a crew that speaks more than one language, any of those messages can get lost without anyone noticing. A nod does not always mean someone understood. Clear communication is a safety control, just like a guard or a harness.
The action
OSHA's general industry rules for walking-working surfaces put it plainly: the employer must provide information and training to each employee in a manner the employee understands. If a talk is only in English and part of the crew mostly speaks Spanish, the talk did not do its job. Use both languages, short words and pictures, and show the task instead of only describing it. (29 CFR 1910.30(d))
ASK THE CREW
Which labels, signs or tags on this job are hard for some of us to read?
From the talk: Safety communication on mixed-language crews. Read it in full, free, with the questions and the sign-in sheet.