Even if the font is "latin-extended, it's essential that it is also a
"Web Safe Font".
Web safe fonts are fonts that everyone has on their computer. Many of us install different fonts mistakenly thinking we can brighten up our web pages and make them look different. That is a big mistake.
Unless the end user (the person looking at your site) has the same fonts installed on their computer, they will see something entirely different. Their browser will substitute your beautiful font with a plain font they have on their computer and all your hard work will be lost. By using web safe fonts, you don't create this problem.
Although there are ways around this, they probably won't work with Oxwall.
Here is a site showing
all the web safe fonts. There are not many. The Mac will substitute the corresponding PC font and visa versa.
http://www.ampsoft.net/webdesign-l/WindowsMacFonts.html