Yes, we support HTML view and text Editor view, but the Text Editor has some limitations, if HTML tags of the original text are complex, the Editor might alter them which can cause the style for translation inconsistent to the original text. Thus, if the HTML tags are complex, we only display the HTML view. If it is simple enough, you can toggle between HTML and Editor view.
In the case that original text have complex HTML tags. If you want to manually translate it, we recommend to copy the HTML part over to the translation field, and then replace the plain text part with the translation text. This can make sure the translation text has the same style as the original text.