Spoke is the past tense of the verb "speak". It is used to describe an action that happened in the past.
Spoken is the past participle of the verb "speak". It is used in perfect tenses (present perfect, past perfect) and as an adjective.
Here are some examples:
* Spoke: "She spoke to her boss about her concerns." (past tense)
* Spoken: "She has spoken to her boss about her concerns." (present perfect)
* Spoken: "The spoken word is powerful." (adjective)
To determine which form is correct, consider the tense of the sentence.