I’m just running into one issue. I’ve set my site language to “french”. The whole admin interface is correctly translated as well as most of the site content.
However, it seems that all translations related to the theme itself are still in English (for example the word “By” prefixing the author name in the article headers). Defining the WPLANG variable in the wp-config file did not help.
I’m using WP 4.6.1 with iconic 1.9.3. The bundled language files for french are untouched and available in the wp-content/languages/themes subfolder.