What is the English translation of the Cajun French phrase 'la glaie bleue'?

"The blue iris" is an English equivalent of the Cajun French phrase la glaie bleue.

Specifically, the feminine singular definite article la means "the." The feminine noun glaie means "iris" in this context. The feminine adjective bleue means "blue."

The pronunciation will be "lah gleh bluh" in French.