<p>I am not sure if Stanford NLP toolkit has a lammetizer, but you can try</p>

<ul>
<li>The state-of-the-art is <a href="http://qatsdemo.cloudapp.net/farasa/" rel="nofollow noreferrer">Farasa Lemmatizer</a>.</li>
<li>MADAMIRA for Arabic processing</li>
</ul>

<p>Farasa Lemmatizer outperforms MADAMIRA Lemmatizer based on accuracy. With accuracy about 97.23% It gives  +7% relative gain above MADAMIRA in lemmatization task.</p>

<p>You can read more about Farasa Lemmatizer from the following link:
<a href="https://arxiv.org/pdf/1710.06700.pdf" rel="nofollow noreferrer">https://arxiv.org/pdf/1710.06700.pdf</a></p>
Arabic lemmatization and Stanford NLP
<p>I try to make lemmatization, ie identifying the lemma and possibly the Arabic root of a verb, for example:
يتصل ==> lemma (infinitive of the verb) ==> اتصل ==> root (triliteral root / Jidr thoulathi)
==> و ص ل</p>

<p>Do you think Stanford NLP can do that?</p>

<p>Best Regards,</p>