I want to translate the "Pay later" option, and the information tooltip says that "If you want to change the text of these options, you can do so in the language files. You need to make the same exact change in both frontend and backend languages files."
Where are those language files? I couldn't find them.
e/ Oh, and how could I change the default country when registering to an event?
To change the default country... locate the file country.htm in /components/com_dtregister.
This contains the list of countries to choose from. Scroll down to find United States. You'll see:
<option value="United States" selected="selected">United States</option>
Remove the code: selected="selected"
Insert the selected value into the option tag for the country you want to be the default option.
By the way, if are using a different language, just change the "en-GB" as seen above to whatever your language tag is. For example, you will find the French files in Joomla's French language directory...
No, there is no country.htm file. That was used in older DT Register versions to populate the country dropdown field. As all fields are managed by you in the fields manager, this is not needed. You control the Country field and what it includes.
The .ini language files control all text displayed from the code. The Joomfish translations control text that comes from the database. Of course, .ini files don't touch anything stored in the database, which includes event names, category names, field data, etc.