Add lingua-go library (#4673)

README.md

@@ -1866,6 +1866,7 @@ See also [Text Processing](#text-processing) and [Text Analysis](#text-analysis)
 - [detectlanguage](https://github.com/detectlanguage/detectlanguage-go) - Language Detection API Go Client. Supports batch requests, short phrase or single word language detection.
 - [getlang](https://github.com/rylans/getlang) - Fast natural language detection package.
 - [guesslanguage](https://github.com/endeveit/guesslanguage) - Functions to determine the natural language of a unicode text.
+- [lingua-go](https://github.com/pemistahl/lingua-go) - An accurate natural language detection library, suitable for long and short text alike. Supports detecting multiple languages in mixed-language text.
 - [whatlanggo](https://github.com/abadojack/whatlanggo) - Natural language detection package for Go. Supports 84 languages and 24 scripts (writing systems e.g. Latin, Cyrillic, etc).
 
 ### Morphological Analyzers