Call load_plugin_textdomain()

[iandunn]

https://wordpress.slack.com/archives/meta-language-packs/p1448049108001972

[iandunn]

4.6 prioritizes translate.w.org packages over bundled ones, so this may no longer be necessary. I'm not sure about that, though.

[Kenshino]

Don't other translation plugins depend on load_plugin_textdomain() ?

[iandunn]

Oh, you mean like WPML? I hadn't thought about that use case, that's a good point.

[Kenshino]

Aye. The theme review team discussed this as well. Core can handle the priority, but the load_plugin_textdomain should remain for compatibility