Dynamically getting the keys from a nested object

Question

I have a 3 level object will be generated similar to how openApi works, at project install time, or as a first step at compile time.

const translations = {
    26: {
        ro: {
            test: 'test',
        },
        en: {
            lorem: 'test',
            test: 'test',
        },
    },
    32: {
        en: {
            test: 'test',
        },
    },
};

The structure represents:

translations -> moduleID (dynamic) -> language (dynamic based on some other settings) -> dynamic based on moduleID

Later in my code we want:

const lang = 'en' 
function getModuleTranslations<K extends keyof typeof x, T extends keyof typeof x[K][lang]>(mid: K): (key: T) => any {
        return (key) => x[mid][lang][key];
    }

....

const translate = getModuleTranslations(32);  // We want type checking & autocomplete here
const testString = translate('test'); // We want type checking & autocomplete here as well based on the above getModuleTranslations(32)

In our case, the language param will be given by the class, at runtime.

I found multiple ways of accessing nested properties this way (translations, '32.en.test'), but this isn't what we want.