The More Complicated Way of Doing it
If you don't want to do it in Wealthy Affiliate, then you'll have to do it manually and install WordPress all these by yourself.
This method takes a lot more time and effort as it is way more complicated. If you want to learn more about this, refer to this page.
Conclusion
There are many reasons for you to build a website in languages other than English.
For example, you are building a website for your local business or your client's local business. Or you're doing a network marketing business in your country and building a website in your language is a good way to expand your reach.
Regardless of your purpose, I hope this training has provided you some useful information on how to change the language of your website and do keyword research & SEO.
I wish you great success. Let me know if you have any questions or comments :)
There are a few words in the default WordPress template that still appear in English on the site but in Indonesia that seems acceptable. I can get that may not be appropriate for a Mandarin site.
You said: "Also, your Permalink should always be in English regardless of your website's language. This is better for Google to understand and rank your posts/pages." Do you have any evidence for this or is it just your "thinking" .. for example Indonesians are searching in Bahasa not English so how would Google correctly rank a search if the permalink is in English? FYI the Bahasa Character set is the same as English.
Cheers, William.