in : Version: 5.0.0.0.beta1 Build ID: 0a16c3dda4150008d9be6f24cbd15ac198d116d3 Locale: fr-FR (fr_FR.UTF-8) french people (and others) don't need this extension
That’s the Spanish dictionary, so of course it won’t get removed.
I don't have this extension enabled on my production version (Version: 4.3.7.2 / Build ID: 430m0(Build:2)), sorry I don't know a lot of things about dev...