Latent semantic indexing, but for other languages than Engli

Dear authors of the classifier library,
Dear all,

I have been using your library to summarize English texts and find
it very nice. Thank you for it!
Somewhere, you use the Porter stemmer to chop off word
endings from English words. Now , I would like to use your
library in combination with any of the stemmers for other
languages,e.g., from the page

_ (

to treat texts in other languages than English.
How could that be done ?
Thank you for your help,