I’ve translated strings, but the plugin is still in English!

When you’ve translated strings on translate.yoast.com, they first need to be validated by the validator for your language.  
Once that is done, we will regularly download the validated translations and update the plugin with them.

So it may take some time before your translations are actually visible in the plugin.

The languages in green (/>= 50% translated) will be shipped with the next update, the languages in red (< 50% translated) will not.

Please note
If your language is at 50% or less, it will not yet be included in the plugin. 
The languages in green will be shipped with the next plugin update, the languages in red will not.