Language support in EOL v3 is in continuous development, but many features are internationalized. Here's where things stand at the moment:
The interface- navigating EOL in different languages:
Thanks to our collaborators at translatewiki and their corps of volunteer translators, the full EOL basic interface navigation is available in Arabic, Brazilian Portuguese, English, Finnish, French, Macedonian, Piedmontese, Traditional Chinese and Turkish. Read more about becoming a volunteer translator.
Common or vernacular names for taxa:
We have harvested the common names holdings of the wikidata, which include just over 291,000 names in 279 languages. We also have >93,000 common names in 130 languages added by valiant EOL members to fill gaps they observed over the past ten years. You can search EOL by any of these names and find them in the names tab of any taxon page.
We have articles in many languages. The article tab has a language filter, which is set to English by default. We hope soon to make that default setting configurable in your EOL profile.
One of the great advantages of structured attribute and interaction data is that it is very efficient to translate. Commonly used data terms like "body length" and "predator" in our taxon page summaries are translated by the translatewiki community, and many place names have translations available from our geographic terms providers, geonames and wikidata.