Topic on Extension talk:I18nTags

We have installed the extension, but sadly it doesn't fit to our needs. it is neither possible to use

<formatnum lang="fa">{{some template}}</formatnum> nor {{some template | lang=fa}} with the formatnum code within the template. The whole text in the template is a simple number!

We quickly deinstalled the extension again.

This is expected. You can use the {{#tag:formatnum}} mechanism to work around this.