Generating language accents?

Are there any presets or plug-ins for Audacity to give your recorded voice an accent (French, German etc.)?

Not that I’ve ever seen. Koz

The foreign accent may be in the ear of the listener, (analogous to the images in Rorschach inkblots ), the mangled voice is misinterpreted as a foreign accent …

Foreign accent syndrome
Those suffering from the condition pronounce their native language with an accent that to listeners may be mistaken as foreign