Search engine crawlers such as Google cannot index locales of a site due to how the canonical URL is currently being implemented in OOTB Liferay. This issue can have a very high impact on a company since it severely limits their ability to market their products globally.
The design specification requested is for the canonical URL to only be self-referencing for each locale that has translated content on a page-by-page basis. This will require the option to configure locale on a page-by-page basis.
See the following article on how to correctly implement canonical URLs alongside hreflang based on SEO best practices: https://www.portent.com/blog/seo/implement-hreflang-canonical-tags-correctly.htm