PoiCategoriesSpecification(language: String? = null)
A constructor used to create an instance of PoiCategoriesSpecification.
language - Language in which the category tree should be returned. One of the TomTom supported IETF language
tags except NGT and NGT-Latn. When language parameters are not set then category tree will be returned in English.
See https://developer.tomtom.com/search-api/search-api/supported-languages for more details
about supported languages.