The Cantarell font does contain all the umlauted letters and germandbls. In fact it covers (almost) every living european language from icelandic to turkish.
The OPs problem sounds more like an encoding problem.
The Cantarell font does contain all the umlauted letters and germandbls. In fact it covers (almost) every living european language from icelandic to turkish.
The OPs problem sounds more like an encoding problem.