However, it's important to remember that context is key in translation. The phrase "parler en" can be used in different ways, and its meaning can vary depending on the situation. Here are some examples:
* "Parler en anglais" would mean "to speak in English".
* "Parler en public" would mean "to speak in public".
* "Parler en code" would mean "to speak in code".
To give you the most accurate translation, please provide me with the full sentence or context in which "parler en" is used.