On ResearchGate, you can change the language to English by:

If you don’t see it, you can also change it in Settings → Account settings → Language.

Precisely.

• Log in to your ResearchGate account.
• Scroll to the bottom of any page.
• On the bottom right, you should see a language option (e.g., “Deutsch,” “Español,” etc.).
• Click it, and a dropdown menu will appear.
• Select English.

You can also go to your profile, click on settings > account settings.

Look for language preferences.