Aside from English, Fusion fully supports French. In fact, we currently have a French version aside from the Australian and New Zealand websites.
We fully support languages that use the basic Latin character set: the twenty-six letters of the Latin alphabet, numbers, and punctuation.
Our text tool uses a variety of typefaces, some of which support extended characters like accent marks necessary for many languages like French.
However, our text tool currently does not support languages that use Cyrillic, Chinese, Japanese characters, or other languages that require characters beyond the Latin alphabet.