If you open a page written in a different language than your preferred languages in settings, Microsoft Edge will automatically prompt you to translate it.
The Translate icon 
appears in the address bar when you go to a web page that’s written in a foreign language. A language is considered foreign to you if it's not included in your Preferred languages list in Settings. To add or remove languages from the list, in Microsoft Edge, go to Settings and more > Settings > Languages.
Open a webpage in Microsoft Edge. The browser will detect the language of the page and a menu will appear asking you to confirm that you want to translate the page.
Do any of the following:
In the Translate to dropdown, choose the language you want the page translated into. The default is the language you've set for Microsoft Edge.
To translate the page, click Translate.
To always automatically translate from the source language, select the Always translate from [Language] check box.
To skip translation, in the list on the lower right, select Not now to skip translation or Never translate [Language] to never have the panel appear when you go to a page using that language.
Note: You can manually return to this panel later, even if you select the option to Never translate.
Inside the address bar, you'll briefly see the status showing that the page has been translated.
If you select the translate icon in the address bar, the menu that appears also shows the status.
If you've set Microsoft Edge to never translate a specific language, you won't see an automatic pop-up prompting you to translate. However, you'll still be able to translate it manually at any time.
To translate the page into a different language:
Select the translate icon in the address bar.
In the Translate to menu, select which language you want to translate to.
Select Translate.
On the address bar, select the translate icon .
Select Show original.
By default, Microsoft Edge will automatically prompt page translations.
To modify this setting:
At the top corner of the browser, select Settings and more 
> Settings.
Select Languages.
Enable or turn off Offer to translate pages that aren't in a language I read.
By default, Microsoft Edge uses the same language as your system. For more information about using different languages in Microsoft Edge, learn how to use Microsoft Edge in another language.