To use Google Translate for content ideas, start by selecting the Websites tab. Then, choose the language you want to translate from on the left dropdown language list. If you're unsure of the language used on the website, you can select "Detect language" to let Google Translate automatically identify it for you. Lastly, on the right dropdown language list, select the language you want the website to be translated into. With this feature, you can explore websites in different languages to discover new content ideas and gain insights from different cultures and perspectives.