Final answer:
Female dancers in Riverdance did wear traditional Irish step dance costumes with Celtic embroidery, representing Irish culture on a global stage.
Step-by-step explanation:
The statement that female dancers in Riverdance used traditional Irish step dance costumes with Celtic embroidery is True. While the referenced materials focus on other forms of dance, notably African American Stepping' and South African gumboot dancing, the Riverdance performances are known for showcasing traditional Irish dance and music. The show has played a significant role in bringing Irish culture to the global stage, with dancers wearing costumes that are often richly decorated with Celtic designs and patterns.