Spontaneous

endémique

(produced without being planted or without human labor)

impulsif

(arising from a momentary impulse)

indigène

(produced without being planted or without human labor)

naturel

(not apparently contrived or manipulated)

réflexe

(controlled and directed internally)

soudain

(sudden, without warning)

spontané

(self generated; happening without any apparent external cause)

spontané

(done by one's own free choice, or without planning)

spontané

(proceeding from natural feeling or native tendency without external constraint)

spontané

(not apparently contrived or manipulated)

volontaire

(self generated; happening without any apparent external cause)