createLanguageConfig
The only argument is an object with the following fields:
| Fields | Default value | Role |
| languages | This field is required | Defines the languages that are available. Consists of an object with language names and indexes with values. |
| defaultLanguage | the first language defined in languages | Defines which language should be selected by default and also the fallback language for any index. |
| localStorageKey | 'react-language-support' | The key for the localStorage item. |
Lang
| Fields | Required | Role |
| children | true | Specifies which index to use. |
| replace | false | List the variables that should be replaced in an object. |