The following languages have a stemming algorithm, which is applied by default:
| Arabic | German | Portuguese |
| Catalan | Greek | Romanian |
| Czech | Hebrew | Russian |
| Danish | Hungarian | Slovak |
| Dutch | Italian | Spanish |
| English | Latin | Swedish |
| Finnish | Norwegian | Welsh |
| French | Polish |
In addition, the following languages have a stemming algorithm embedded in the sentence breaking library:
Chinese
Japanese
Korean
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