support for mixed language detection

[joprice]

I see that the rust version has a detect_multiple_languages_of function. Would it be possible to implement this in the dotnet version?

[russcam]

Hi @joprice, this would be a good feature to include. Would you be interested in contributing it?

[joprice]

I found that the accuracy was too low for it to be usable for my use case when texts contained things like code-switching or short words or phrases, so I won't be pursuing that approach for now.