I'm building a site with multilingual support using Entity Translation. It is allowing authors to specify a language when creating a node, but there's no way to specify language when commenting on a node.
In Configuration > Entity translation, the Comment item is checked in the Translatable Entity Types section.
In Structure > Content Types > Post, I see tabs for Comment Fields, and Comment Display, but language is not one of the options.
I have been looking into the form_comment_form_alter hook, but so far have had no success with that.
In the Permissions panel, I confirmed that Administrator has "Translate entities of type Comment" checked. Even when editing a comment as admin, there is no option to translate.
The site uses Organic Groups 7.x-2.5, if that could influence this problem. The OG Post content type is the main one I'm trying to get fully functional.