I have the same problem as a previous person in the forum, although the other thread is over a year old. Certain fields in the panel are empty, most likely due to missing language strings. I chose Danish in the installation process, but cannot find where to change that, or where to add missing strings. I see that there is a data/textlang.sql file in the /install directory - perhaps that needs to be run manually.
I used the process at the /install url when I installed Seo Panel, which is the advice given in the previous thread in this forum.
I wish you had used gettext for translations, it's faster and has a fallback to original language if no translation is found.
Please help.