1) language files, when i updated TinyMCE library I forget add new language packages, fixed in this version, please download again plugin package and install it.

2) You dont see spelchecker button, beacuse this enable browse spellchecking, maybe in future version i add spellchecker plugin, but this require Enchant in your PHP. When you write something in textarea in other langiage than your browser, you see red underline

3) Format h2, oxwall core filterimg tags, so not everything will be visible, You can enable all html tags, but you must edit oxwall core, more https://developers.oxwall.com/forum/topic/57512?page=1

4) emoji plugin -- developer emoji plugin musi do integration, i can't do it in my plugin. You can edit, you can use emoticons plugin in oxwall and add emojis smileys (more: http://projects.artmedia.biz.pl/view.php?id=17)

5) TinyMCE using own directory when upload images, If you want  old media library, here is tutorial http://projects.artmedia.biz.pl/view.php?id=18