type CamelCasedPropertiesDeep converting Record into {}

[salomaoluiz]

In my tests I'm using the CamelCasedPropertiesDeep to convert the returns of an API, and we have a property that returns an object with some languages and their respective translations, we type this return as title: Record<string, string> but when we use the CamelCasedPropertiesDeep it returns the type as title: {} and when we try to get the language like: title[acceptedLanguage] we got a error TS (7053).

Example Used:

interface APIReturn {
	title: Record<string, string>
}

class API {
	get = (): Promise<CamelCasedPropertiesDeep<APIReturn>> => Promise.resolve({
		title: {
			en: "English Translate"
		}
	})
}

const translate = (apiReturn: AsyncReturnType<API['get']>, acceptedLanguage: string) => apiReturn.title[acceptedLanguage]

Is this an error on the type or can we use another type instead of Record to type this title?