"Hailamese" means: of or relating to the linguistic variety under Coastal Min under Min Chinese of the Sinitic family and its speakers or people of heritage fr.... This is a fairly neutral word with no inherent risk attached. There is no real cause for parental concern; it is descriptive vocabulary rather than something dangerous. If your child uses it, context will usually make the meaning clear. A brief, curious question about where they heard it is generally enough to know whether to follow up.