Multilingual SEO is the act of optimizing the content on your website for different languages, so you come searchable in new requests, and people in different countries can find your website through an organic hunt.
SEO experts will tell you that multilingual SEO means you have to optimize your point for native speakers of languages in countries other than your own.
How to improve your Multilingual SEO:
1. Use dedicated URLs
2. Apply hreflang tags
3. Stick to one language per page
4. Translate your metadata