Hi Padua,

Thank you for your feedback, a new Version (1.0.2) is out based on them.

The version 1.0.2 save now the Translation Engine as a preference.
There is only one click for translating a page from contextual menu, the last language used will be use for translating.
If no preference English will be used as a default.

Edit:

The version 2.0 contains now the ability to translate only a text from the web page. Just select the required text and right clic + translate text with WebTranslate :). Enjoy