I discovered that the following HTML code does not work on Android (it will only use the default font: Droid Sans. On desktop it is working as expected.
<p style='font-family: "Droid Sans",sans-serif;'>vând whisky și tequila, preț fix.</p>
<p style='font-family: "Droid Sans Mono",monospace;'>vând whisky și tequila, preț fix.</p>
<p style='font-family: "Droid Serif",serif;'>vând whisky și tequila, preț fix.</p>
You probably don't have an @font-face declaration for the other typefaces in your css. I imagine you only have one for Droid Sans. You need one for each typeface. For example, in your css you should have:
And then in your code, your font-family should be the same as those you declared in the css above (i.e. font-family: 'Droid Sans'; is not the same as font-family: 'DroidSans')
Try it and see how you get on.