Install the package.
If you want to enable the language checking functions, install one of the corresponding dictionaries. The selection of languages available in TeXstudio will match the hunspell dictionaries installed. If no dictionaries are installed, it is impossible to select a language in the application.and at least
You can also install LanguageTool server. In any case, you need to install the hunspell dictionary for your desired language, otherwise TeXstudio will not let you select it, even if your LanguageTool installation or server supports it.for a more advanced language check, or connect to a remote