yeah celebrate eid still use phrases like mashallah alhamdulilah inshallah just because it's apart of their vocab nowLanguage is a clear and important parameter. Beyond that, besides dress and food, which are far less dire to preserve (more superficial) and transient anyway (look at Somali attire 30 years ago and today), what else?
You mean like going to eid prayer once a year and making afr during Ramadan like Western Christians do with Christmas?