May sites will use a single country version of their site to represent a common language. One of the most common is Spanish. If the site has a /es and that is for all markets that speak Spanish you can set that easily in HREFLang Builder.
The syntax to set any global language is to use only two letter language code for example to set Spanish you would use <link rel=”alternate” href=”http://example.com/es/” hreflang=”es” />
Setting x-default in HREFBuilder
Step 1 – Select the country language that you want to set to a global Language then click the “Edit File” option for that entry
Step 2 – In the Country Language Selector, click the pull-down and select the appropriate global language. The middle section of the scroll has all of the global language options.
Step 3 – Click the Blue up or down arrows to go to the top or bottom of the page and click update.
Google should show this version of the site in any market with that language where you don’t have a market-specific language version.