When you have created and saved your recipe you can click the "Edit" icon on the recipe page to edit it. When you are on the first page of the create recipe wizard you can change the language in the language dropdown in the main menu. Translate any free text in the recipe and save it, you now have your first translation saved.
Please note that in case you have translated a recipe and make a change in any translation of the recipe you should make the same change for all other translations before publishing the recipe.