WPML is an in-browser multi-lingual translation plugin. It provides facility to translate WordPress, Themes, and Plugins strings and add contents in multi-language.
WPML is a commercial plugin. So, you need to purchase a copy of WPML, with below modules, to start the translation.
- WPML String Translation
- WPML Translation Management
- Advanced Custom Fields Multilingual (ACFML)
Check below video for WPML setup.