Guahan Web

This plugin gives you the flexibility to add Ajax handling for your comments to keep the page from having to refresh every post. The administration panel will allow you to customize your processing, success and error messages.
Additionally, this plugin gives you the option of setting up the WYSIWYG editor for comment submission as well. The admin panel will give you the option to show/hide various button groups for the editor and only allows basic editing capabilities. If logged in as administrator, you will still receive the full WYSIWYG editor for your commenting.

GuahanWeb AJAX & WYSIWYG Comments

Adds customization for Ajax commenting and allows for enabling of custom WYSIWYG editor.

Andrew Ozz

This plugin adds 30 languages to <a href="https://wordpress.org/plugins/tinymce-advanced/" rel="ugc">TinyMCE Advanced</a>: 
Arabic (ar), Belarusian (be), Bokmål Norwegian (nb), Bulgarian (bg), Catalan (ca), Simplified Chinese (cn), Czech (cs), Danish (da), Dutch, Flemish (nl), Farsi (fa), Finnish (fi), Galician (gl), Greek (el), Hebrew (he), Hungarian (hu), Indonesian (id), Central Khmer (km), Korean (ko), Latvian (lv), Lithuanian (lt), Macedonian (mk), Norwegian (no), Polish (pl), Romanian (ro), Slovak (sk), Slovenian (sl), Swedish (sv), Turkish (tr), Ukrainian (uk), Welsh (cy).
If you have set WordPress to one of these languages and this plugin is enabled, the TinyMCE Advanced plugin will use that language for all buttons and popups added to the Visual editor.

TinyMCE Advanced Language Pack

Adds more translations for the TinyMCE components used in the TinyMCE Advanced plugin.

GuahanWeb AJAX & WYSIWYG Comments vs TinyMCE Advanced Language Pack