All but the tiny_mce editor is not translated so as we are a user that migrated from 6.x to 7.0 we are familiar with the translation that needs to be done in the centralized files /Languages, the Widgets & resources, but TinyMCE uses it's own language packs. The language is selected by the initialization of the tinyMCE editor see snippit:
Again we already downloaded the correct [nl] language for tinyMCE but see no option within telligent (controlpanel and/or .config files) to select this for us. When using the start forum discussion.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "www.w3.org/.../xhtml1-strict.dtd">
<title>Simple theme example</title>
<!-- TinyMCE -->
language : "nl", // change language here
mode : "textareas",
theme : "simple"
<!-- /TinyMCE -->