<p>If it is not strict to using only NLTK, you can try our robust and language-independent POS tagging toolkit <a href="http://rdrpostagger.sourceforge.net/" rel="nofollow">RDRPOSTagger</a>.</p>

<p>(License: GPLv2; Programming Language: Python &amp; Java)</p>

<p>RDRPOSTagger obtains fast performance in both learning and tagging process. In addition, RDRPOSTagger achieves a very competitive accuracy in comparison to the state-of-the-art results. </p>

<p>Updated 18/11/2015: release version 1.2 with improved tagging accuracy, especially on morphologically rich languages.  See experimental results including performance speed and tagging accuracy in <a href="http://arxiv.org/abs/1412.4021" rel="nofollow">this paper</a>. </p>

<p>RDRPOSTagger supports pre-trained POS and morphological tagging models for Bulgarian, Czech, Dutch, English, French, German, Hindi, Italian, Portuguese, Spanish, Swedish, Thai and Vietnamese. RDRPOSTagger also supports the pre-trained Universal POS tagging models for 40 languages.</p>
NLTK other language POS tagger
<p>I am using the nltk module in python and i am trying to use this for POS tagging different languages.</p>

<p>There is a lot of information on how to train your own POS tagger in different languages - is there a database of really robust well built and tested NLTK POS taggers for different languages?
(It is quite easy to export POS taggers using the pickle module)</p>