如果不存在，如何添加NSLinguisticTagger Scheme

Question

I need to get stem of word. So i can't get if lemma scheme doesn't exist for english.

Here's the code that i'm testing available tag schemes :

    let tagSchemes = NSLinguisticTagger.availableTagSchemes(forLanguage: "en")
    print(tagSchemes)

and this is output:

[__C.NSLinguisticTagScheme(_rawValue: TokenType),
     __C.NSLinguisticTagScheme(_rawValue: Language),
     __C.NSLinguisticTagScheme(_rawValue: Script)]

Notice that, simulators will return all scheme. My issue is on my device. You can try 'fr' or 'de' except 'en'.

Answer 1

Basically can't. iOS SDK doesn't exist this feature yet. Some tag schemes only available for which language used on keyboard as in my question.